diff --git a/kb/kb.go b/kb/kb.go
index 2a7b6724..dd2de14d 100644
--- a/kb/kb.go
+++ b/kb/kb.go
@@ -23,7 +23,8 @@ var Instance types.GraphRag = nil
 
 // KnowledgeBase is the Knowledge Base instance
 type KnowledgeBase struct {
-	Config *kbtypes.Config // Knowledge Base configuration
+	Config    *kbtypes.Config         // Knowledge Base configuration
+	Providers *kbtypes.ProviderConfig // Multi-language provider configurations
 	*graphrag.GraphRag
 }
 
@@ -52,6 +53,13 @@ func Load(appConfig config.Config) (*KnowledgeBase, error) {
 		return nil, err
 	}
 
+	// Load providers from directories
+	providers, err := kbtypes.LoadProviders("kb")
+	if err != nil {
+		return nil, err
+	}
+	config.Providers = providers
+
 	// Set global configurations for providers to use
 	kbtypes.SetGlobalPDF(config.PDF)
 	kbtypes.SetGlobalFFmpeg(config.FFmpeg)
@@ -69,7 +77,7 @@ func Load(appConfig config.Config) (*KnowledgeBase, error) {
 	}
 
 	// Set the instance
-	instance := &KnowledgeBase{Config: &config, GraphRag: graphRag}
+	instance := &KnowledgeBase{Config: &config, Providers: providers, GraphRag: graphRag}
 
 	// Set the instance to the global variable
 	Instance = instance
@@ -88,48 +96,13 @@ func GetProviders(typ string, ids []string, locale string) ([]kbtypes.Provider,
 		return nil, fmt.Errorf("knowledge base not initialized")
 	}
 
-	// Get the configuration
-	conf := knowledgeBase.Config
-	if conf == nil {
-		return nil, fmt.Errorf("configuration not found")
+	// Default locale to "en" if empty
+	if locale == "" {
+		locale = "en"
 	}
 
-	providers := []*kbtypes.Provider{}
-	switch typ {
-	case "chunking":
-		providers = conf.Chunkings
-
-	case "converter":
-		providers = conf.Converters
-
-	case "embedding":
-		providers = conf.Embeddings
-
-	case "extractor":
-		providers = conf.Extractors
-
-	case "fetcher":
-		providers = conf.Fetchers
-
-	case "searcher":
-		providers = conf.Searchers
-
-	case "reranker":
-		providers = conf.Rerankers
-
-	case "vote":
-		providers = conf.Votes
-
-	case "weight":
-		providers = conf.Weights
-
-	case "score":
-		providers = conf.Scores
-
-	default:
-		return nil, fmt.Errorf("invalid provider type: %s", typ)
-
-	}
+	// Get providers for the requested type and language
+	providers := knowledgeBase.Providers.GetProviders(typ, locale)
 
 	// Filter empty ids
 	filteredIds := []string{}
@@ -149,8 +122,13 @@ func GetProviders(typ string, ids []string, locale string) ([]kbtypes.Provider,
 	return filteredProviders, nil
 }
 
-// GetProvider returns a provider by id
+// GetProvider returns a provider by id with default language "en"
 func GetProvider(typ string, id string) (*kbtypes.Provider, error) {
+	return GetProviderWithLanguage(typ, id, "en")
+}
+
+// GetProviderWithLanguage returns a provider by id, type, and language
+func GetProviderWithLanguage(typ string, id string, locale string) (*kbtypes.Provider, error) {
 	if Instance == nil {
 		return nil, fmt.Errorf("knowledge base not initialized")
 	}
@@ -160,53 +138,10 @@ func GetProvider(typ string, id string) (*kbtypes.Provider, error) {
 		return nil, fmt.Errorf("knowledge base not initialized")
 	}
 
-	conf := knowledgeBase.Config
-	if conf == nil {
-		return nil, fmt.Errorf("configuration not found")
+	// Default locale to "en" if empty
+	if locale == "" {
+		locale = "en"
 	}
 
-	providers := []*kbtypes.Provider{}
-	switch typ {
-	case "chunking":
-		providers = conf.Chunkings
-
-	case "converter":
-		providers = conf.Converters
-
-	case "embedding":
-		providers = conf.Embeddings
-
-	case "extractor":
-		providers = conf.Extractors
-
-	case "fetcher":
-		providers = conf.Fetchers
-
-	case "searcher":
-		providers = conf.Searchers
-
-	case "reranker":
-		providers = conf.Rerankers
-
-	case "vote":
-		providers = conf.Votes
-
-	case "weight":
-		providers = conf.Weights
-
-	case "score":
-		providers = conf.Scores
-
-	default:
-		return nil, fmt.Errorf("invalid provider type: %s", typ)
-	}
-
-	// Find the provider by id
-	for _, provider := range providers {
-		if provider.ID == id {
-			return provider, nil
-		}
-	}
-
-	return nil, fmt.Errorf("provider %s not found", id)
+	return knowledgeBase.Providers.GetProvider(typ, id, locale)
 }
diff --git a/kb/kb_test.go b/kb/kb_test.go
index 6e534087..46c9e2b4 100644
--- a/kb/kb_test.go
+++ b/kb/kb_test.go
@@ -4,6 +4,7 @@ import (
 	"testing"
 
 	"github.com/yaoapp/yao/config"
+	kbtypes "github.com/yaoapp/yao/kb/types"
 	"github.com/yaoapp/yao/test"
 )
 
@@ -12,8 +13,134 @@ func TestLoad(t *testing.T) {
 	test.Prepare(&testing.T{}, config.Conf)
 	defer test.Clean()
 
+	kb, err := Load(config.Conf)
+	if err != nil {
+		t.Fatalf("Failed to load knowledge base: %v", err)
+	}
+
+	// Test that providers are loaded
+	if kb != nil && kb.Providers != nil {
+		t.Logf("Knowledge base loaded successfully with providers")
+	}
+}
+
+func TestGetProviders(t *testing.T) {
+	// Setup
+	test.Prepare(&testing.T{}, config.Conf)
+	defer test.Clean()
+
 	_, err := Load(config.Conf)
 	if err != nil {
 		t.Fatalf("Failed to load knowledge base: %v", err)
 	}
+
+	// Test getting providers for different languages
+	testCases := []struct {
+		providerType string
+		locale       string
+		expectEmpty  bool
+	}{
+		{"chunking", "en", false},
+		{"embedding", "en", false},
+		{"chunking", "zh-cn", false},
+		{"embedding", "zh-cn", false},
+		{"chunking", "nonexistent", false}, // Should fallback to "en"
+	}
+
+	for _, tc := range testCases {
+		providers, err := GetProviders(tc.providerType, []string{}, tc.locale)
+		if err != nil {
+			t.Errorf("Failed to get %s providers for locale %s: %v", tc.providerType, tc.locale, err)
+			continue
+		}
+
+		if tc.expectEmpty && len(providers) > 0 {
+			t.Errorf("Expected empty providers for %s/%s, got %d", tc.providerType, tc.locale, len(providers))
+		} else if !tc.expectEmpty && len(providers) == 0 {
+			t.Logf("No providers found for %s/%s (this may be expected if no provider files exist)", tc.providerType, tc.locale)
+		} else {
+			t.Logf("Found %d providers for %s/%s", len(providers), tc.providerType, tc.locale)
+		}
+	}
+}
+
+func TestGetProviderWithLanguage(t *testing.T) {
+	// Setup
+	test.Prepare(&testing.T{}, config.Conf)
+	defer test.Clean()
+
+	_, err := Load(config.Conf)
+	if err != nil {
+		t.Fatalf("Failed to load knowledge base: %v", err)
+	}
+
+	// Test getting a specific provider with language
+	provider, err := GetProviderWithLanguage("chunking", "__yao.structured", "en")
+	if err != nil {
+		t.Logf("Provider __yao.structured not found for chunking/en: %v (this may be expected if provider files don't exist)", err)
+	} else {
+		t.Logf("Found provider: %s", provider.ID)
+	}
+
+	// Test language fallback
+	provider, err = GetProviderWithLanguage("chunking", "__yao.structured", "nonexistent")
+	if err != nil {
+		t.Logf("Provider __yao.structured not found with fallback: %v (this may be expected if provider files don't exist)", err)
+	} else {
+		t.Logf("Found provider with fallback: %s", provider.ID)
+	}
+}
+
+func TestLoadProviders(t *testing.T) {
+	// Setup
+	test.Prepare(&testing.T{}, config.Conf)
+	defer test.Clean()
+
+	// Test loading providers from a directory
+	providers, err := kbtypes.LoadProviders("kb")
+	if err != nil {
+		t.Fatalf("Failed to load providers: %v", err)
+	}
+
+	if providers == nil {
+		t.Fatal("Providers config is nil")
+	}
+
+	// Check if provider maps are initialized
+	if providers.Chunkings == nil {
+		t.Error("Chunkings map is nil")
+	}
+	if providers.Embeddings == nil {
+		t.Error("Embeddings map is nil")
+	}
+
+	t.Logf("Loaded providers successfully")
+}
+
+func TestProviderConfigGetProviders(t *testing.T) {
+	// Setup
+	test.Prepare(&testing.T{}, config.Conf)
+	defer test.Clean()
+
+	providers, err := kbtypes.LoadProviders("kb")
+	if err != nil {
+		t.Fatalf("Failed to load providers: %v", err)
+	}
+
+	// Test getting providers for different types and languages
+	testCases := []string{"chunking", "embedding", "converter", "extractor", "fetcher"}
+
+	for _, providerType := range testCases {
+		// Test with "en"
+		enProviders := providers.GetProviders(providerType, "en")
+		t.Logf("Found %d %s providers for 'en'", len(enProviders), providerType)
+
+		// Test with "zh-cn"
+		zhProviders := providers.GetProviders(providerType, "zh-cn")
+		t.Logf("Found %d %s providers for 'zh-cn'", len(zhProviders), providerType)
+
+		// Test with nonexistent language (should fallback to "en")
+		fallbackProviders := providers.GetProviders(providerType, "nonexistent")
+		t.Logf("Found %d %s providers for 'nonexistent' (fallback)", len(fallbackProviders), providerType)
+	}
 }
diff --git a/kb/types/config.go b/kb/types/config.go
index 51b86d7a..5f1406e5 100644
--- a/kb/types/config.go
+++ b/kb/types/config.go
@@ -272,20 +272,31 @@ func (c *Config) resolveAllEnvVars() error {
 
 // resolveProviderEnvVars resolves environment variables in provider configurations
 func (c *Config) resolveProviderEnvVars() error {
-	providerLists := [][]*Provider{
-		c.Chunkings, c.Embeddings, c.Converters, c.Extractors,
-		c.Fetchers, c.Searchers, c.Rerankers, c.Votes, c.Weights, c.Scores,
+	if c.Providers == nil {
+		return nil
 	}
 
-	for _, providers := range providerLists {
-		for _, provider := range providers {
-			for _, option := range provider.Options {
-				if option.Properties != nil {
-					resolved, err := c.resolveEnvVars(option.Properties)
-					if err != nil {
-						return err
+	// Resolve env vars for all provider types and languages
+	providerMaps := []map[string][]*Provider{
+		c.Providers.Chunkings, c.Providers.Embeddings, c.Providers.Converters, c.Providers.Extractors,
+		c.Providers.Fetchers, c.Providers.Searchers, c.Providers.Rerankers, c.Providers.Votes,
+		c.Providers.Weights, c.Providers.Scores,
+	}
+
+	for _, providerMap := range providerMaps {
+		if providerMap == nil {
+			continue
+		}
+		for _, providers := range providerMap {
+			for _, provider := range providers {
+				for _, option := range provider.Options {
+					if option.Properties != nil {
+						resolved, err := c.resolveEnvVars(option.Properties)
+						if err != nil {
+							return err
+						}
+						option.Properties = resolved
 					}
-					option.Properties = resolved
 				}
 			}
 		}
@@ -335,8 +346,13 @@ func (c *Config) ComputeFeatures() Features {
 
 	// File format support (based on converters)
 	converterMap := make(map[string]bool)
-	for _, provider := range c.Converters {
-		converterMap[provider.ID] = true
+	if c.Providers != nil && c.Providers.Converters != nil {
+		// Check all languages for converter availability
+		for _, providers := range c.Providers.Converters {
+			for _, provider := range providers {
+				converterMap[provider.ID] = true
+			}
+		}
 	}
 
 	features.PlainText = true // Plain text is always supported as a basic feature
@@ -346,13 +362,28 @@ func (c *Config) ComputeFeatures() Features {
 	features.ImageAnalysis = converterMap["__yao.vision"]
 
 	// Advanced features
-	features.EntityExtraction = len(c.Extractors) > 0
-	features.WebFetching = len(c.Fetchers) > 0
-	features.CustomSearch = len(c.Searchers) > 0
-	features.ResultReranking = len(c.Rerankers) > 0
-	features.SegmentVoting = len(c.Votes) > 0
-	features.SegmentWeighting = len(c.Weights) > 0
-	features.SegmentScoring = len(c.Scores) > 0
+	if c.Providers != nil {
+		features.EntityExtraction = c.hasProvidersInAnyLanguage(c.Providers.Extractors)
+		features.WebFetching = c.hasProvidersInAnyLanguage(c.Providers.Fetchers)
+		features.CustomSearch = c.hasProvidersInAnyLanguage(c.Providers.Searchers)
+		features.ResultReranking = c.hasProvidersInAnyLanguage(c.Providers.Rerankers)
+		features.SegmentVoting = c.hasProvidersInAnyLanguage(c.Providers.Votes)
+		features.SegmentWeighting = c.hasProvidersInAnyLanguage(c.Providers.Weights)
+		features.SegmentScoring = c.hasProvidersInAnyLanguage(c.Providers.Scores)
+	}
 
 	return features
 }
+
+// hasProvidersInAnyLanguage checks if there are providers available in any language
+func (c *Config) hasProvidersInAnyLanguage(providerMap map[string][]*Provider) bool {
+	if providerMap == nil {
+		return false
+	}
+	for _, providers := range providerMap {
+		if len(providers) > 0 {
+			return true
+		}
+	}
+	return false
+}
diff --git a/kb/types/config_test.go b/kb/types/config_test.go
index d2121e8c..35acf616 100644
--- a/kb/types/config_test.go
+++ b/kb/types/config_test.go
@@ -8,7 +8,7 @@ import (
 	"testing"
 )
 
-// Test data for configuration parsing
+// Test data for configuration parsing (providers are now loaded from directories)
 const testConfigJSON = `{
 	"vector": {
 		"driver": "qdrant",
@@ -32,78 +32,14 @@ const testConfigJSON = `{
 		"ffmpeg_path": "/usr/bin/ffmpeg",
 		"ffprobe_path": "/usr/bin/ffprobe",
 		"enable_gpu": true
-	},
-	"chunkings": [
-		{
-			"id": "__yao.structured",
-			"label": "Document Structure",
-			"description": "Split text by document structure",
-			"default": true,
-			"options": []
-		}
-	],
-	"embeddings": [
-		{
-			"id": "__yao.openai",
-			"label": "OpenAI",
-			"description": "OpenAI embeddings",
-			"default": true,
-			"options": []
-		}
-	],
-	"converters": [
-		{
-			"id": "__yao.office",
-			"label": "Office Documents",
-			"description": "Process office documents",
-			"options": []
-		},
-		{
-			"id": "__yao.ocr",
-			"label": "OCR",
-			"description": "OCR processing",
-			"options": []
-		}
-	],
-	"extractors": [
-		{
-			"id": "__yao.openai",
-			"label": "OpenAI Extractor",
-			"description": "Entity extraction",
-			"options": []
-		}
-	],
-	"fetchers": [
-		{
-			"id": "__yao.http",
-			"label": "HTTP Fetcher",
-			"description": "Fetch from web",
-			"options": []
-		}
-	]
+	}
 }`
 
 const minimalConfigJSON = `{
 	"vector": {
 		"driver": "qdrant",
 		"config": {}
-	},
-	"chunkings": [
-		{
-			"id": "__yao.structured",
-			"label": "Document Structure",
-			"description": "Split text",
-			"options": []
-		}
-	],
-	"embeddings": [
-		{
-			"id": "__yao.openai",
-			"label": "OpenAI",
-			"description": "OpenAI embeddings",
-			"options": []
-		}
-	]
+	}
 }`
 
 func TestParseConfigFromJSON(t *testing.T) {
@@ -285,19 +221,37 @@ func TestConfig_ComputeFeatures(t *testing.T) {
 				Graph:  &GraphConfig{Driver: "neo4j"},
 				PDF:    &PDFConfig{ConvertTool: "pdftoppm"},
 				FFmpeg: &FFmpegConfig{FFmpegPath: "/usr/bin/ffmpeg"},
-				Converters: []*Provider{
-					{ID: "__yao.office"},
-					{ID: "__yao.ocr"},
-					{ID: "__yao.whisper"},
-					{ID: "__yao.vision"},
+				Providers: &ProviderConfig{
+					Converters: map[string][]*Provider{
+						"en": {
+							{ID: "__yao.office"},
+							{ID: "__yao.ocr"},
+							{ID: "__yao.whisper"},
+							{ID: "__yao.vision"},
+						},
+					},
+					Extractors: map[string][]*Provider{
+						"en": {{ID: "test"}},
+					},
+					Fetchers: map[string][]*Provider{
+						"en": {{ID: "test"}},
+					},
+					Searchers: map[string][]*Provider{
+						"en": {{ID: "test"}},
+					},
+					Rerankers: map[string][]*Provider{
+						"en": {{ID: "test"}},
+					},
+					Votes: map[string][]*Provider{
+						"en": {{ID: "test"}},
+					},
+					Weights: map[string][]*Provider{
+						"en": {{ID: "test"}},
+					},
+					Scores: map[string][]*Provider{
+						"en": {{ID: "test"}},
+					},
 				},
-				Extractors: []*Provider{{ID: "test"}},
-				Fetchers:   []*Provider{{ID: "test"}},
-				Searchers:  []*Provider{{ID: "test"}},
-				Rerankers:  []*Provider{{ID: "test"}},
-				Votes:      []*Provider{{ID: "test"}},
-				Weights:    []*Provider{{ID: "test"}},
-				Scores:     []*Provider{{ID: "test"}},
 			},
 			expected: Features{
 				GraphDatabase:    true,
@@ -320,9 +274,10 @@ func TestConfig_ComputeFeatures(t *testing.T) {
 		{
 			name: "minimal config",
 			config: &Config{
-				Graph:  nil,
-				PDF:    nil,
-				FFmpeg: nil,
+				Graph:     nil,
+				PDF:       nil,
+				FFmpeg:    nil,
+				Providers: nil,
 			},
 			expected: Features{
 				GraphDatabase:   false,
@@ -535,23 +490,7 @@ func TestConfig_ResolveEnvVarsOnParsing(t *testing.T) {
 				"username": "$ENV.TEST_GRAPH_USER",
 				"password": "$ENV.TEST_GRAPH_PASS"
 			}
-		},
-		"chunkings": [
-			{
-				"id": "__yao.structured",
-				"label": "Document Structure",
-				"description": "Split text",
-				"options": []
-			}
-		],
-		"embeddings": [
-			{
-				"id": "__yao.openai",
-				"label": "OpenAI",
-				"description": "OpenAI embeddings",
-				"options": []
-			}
-		]
+		}
 	}`
 
 	// Parse config from JSON
@@ -582,3 +521,186 @@ func TestConfig_ResolveEnvVarsOnParsing(t *testing.T) {
 		t.Errorf("Expected vector port to remain 6333.0, got %v (type %T)", config.Vector.Config["port"], config.Vector.Config["port"])
 	}
 }
+
+func TestProviderConfig_GetProviders(t *testing.T) {
+	// Create test provider config
+	providerConfig := &ProviderConfig{
+		Chunkings: map[string][]*Provider{
+			"en": {
+				{ID: "__yao.structured", Label: "Document Structure", Description: "Split by structure"},
+				{ID: "__yao.semantic", Label: "Semantic Split", Description: "AI-powered splitting"},
+			},
+			"zh-cn": {
+				{ID: "__yao.structured", Label: "文档结构", Description: "按结构分割"},
+			},
+		},
+		Embeddings: map[string][]*Provider{
+			"en": {
+				{ID: "__yao.openai", Label: "OpenAI", Description: "OpenAI embeddings"},
+			},
+		},
+	}
+
+	tests := []struct {
+		name         string
+		providerType string
+		language     string
+		expectedLen  int
+		expectedIDs  []string
+	}{
+		{
+			name:         "get chunking providers for en",
+			providerType: "chunking",
+			language:     "en",
+			expectedLen:  2,
+			expectedIDs:  []string{"__yao.structured", "__yao.semantic"},
+		},
+		{
+			name:         "get chunking providers for zh-cn",
+			providerType: "chunking",
+			language:     "zh-cn",
+			expectedLen:  1,
+			expectedIDs:  []string{"__yao.structured"},
+		},
+		{
+			name:         "get embedding providers for en",
+			providerType: "embedding",
+			language:     "en",
+			expectedLen:  1,
+			expectedIDs:  []string{"__yao.openai"},
+		},
+		{
+			name:         "fallback to en when language not found",
+			providerType: "embedding",
+			language:     "fr", // Not available, should fallback to en
+			expectedLen:  1,
+			expectedIDs:  []string{"__yao.openai"},
+		},
+		{
+			name:         "return empty when provider type not found",
+			providerType: "nonexistent",
+			language:     "en",
+			expectedLen:  0,
+			expectedIDs:  []string{},
+		},
+		{
+			name:         "return empty when no providers for language",
+			providerType: "converter", // Empty in test config
+			language:     "en",
+			expectedLen:  0,
+			expectedIDs:  []string{},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			providers := providerConfig.GetProviders(tt.providerType, tt.language)
+
+			if len(providers) != tt.expectedLen {
+				t.Errorf("Expected %d providers, got %d", tt.expectedLen, len(providers))
+				return
+			}
+
+			// Check provider IDs
+			actualIDs := make([]string, len(providers))
+			for i, provider := range providers {
+				actualIDs[i] = provider.ID
+			}
+
+			for _, expectedID := range tt.expectedIDs {
+				found := false
+				for _, actualID := range actualIDs {
+					if actualID == expectedID {
+						found = true
+						break
+					}
+				}
+				if !found {
+					t.Errorf("Expected provider ID '%s' not found in results: %v", expectedID, actualIDs)
+				}
+			}
+		})
+	}
+}
+
+func TestProviderConfig_GetProvider(t *testing.T) {
+	// Create test provider config
+	providerConfig := &ProviderConfig{
+		Chunkings: map[string][]*Provider{
+			"en": {
+				{ID: "__yao.structured", Label: "Document Structure", Description: "Split by structure"},
+				{ID: "__yao.semantic", Label: "Semantic Split", Description: "AI-powered splitting"},
+			},
+			"zh-cn": {
+				{ID: "__yao.structured", Label: "文档结构", Description: "按结构分割"},
+			},
+		},
+	}
+
+	tests := []struct {
+		name         string
+		providerType string
+		providerID   string
+		language     string
+		expectError  bool
+		expectedID   string
+	}{
+		{
+			name:         "get existing provider in requested language",
+			providerType: "chunking",
+			providerID:   "__yao.structured",
+			language:     "en",
+			expectError:  false,
+			expectedID:   "__yao.structured",
+		},
+		{
+			name:         "get provider with language fallback",
+			providerType: "chunking",
+			providerID:   "__yao.semantic", // Only exists in "en"
+			language:     "fr",             // Should fallback to "en"
+			expectError:  false,
+			expectedID:   "__yao.semantic",
+		},
+		{
+			name:         "provider not found",
+			providerType: "chunking",
+			providerID:   "__yao.nonexistent",
+			language:     "en",
+			expectError:  true,
+		},
+		{
+			name:         "invalid provider type",
+			providerType: "invalid",
+			providerID:   "__yao.structured",
+			language:     "en",
+			expectError:  true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			provider, err := providerConfig.GetProvider(tt.providerType, tt.providerID, tt.language)
+
+			if tt.expectError {
+				if err == nil {
+					t.Error("Expected error, got nil")
+				}
+				return
+			}
+
+			if err != nil {
+				t.Errorf("Unexpected error: %v", err)
+				return
+			}
+
+			if provider == nil {
+				t.Error("Expected provider, got nil")
+				return
+			}
+
+			if provider.ID != tt.expectedID {
+				t.Errorf("Expected provider ID '%s', got '%s'", tt.expectedID, provider.ID)
+			}
+		})
+	}
+}
diff --git a/kb/types/provider.go b/kb/types/provider.go
index 3257c7c0..3793d7f4 100644
--- a/kb/types/provider.go
+++ b/kb/types/provider.go
@@ -1,6 +1,14 @@
 package types
 
-import jsoniter "github.com/json-iterator/go"
+import (
+	"fmt"
+	"path/filepath"
+	"strings"
+
+	jsoniter "github.com/json-iterator/go"
+	"github.com/yaoapp/gou/application"
+	"github.com/yaoapp/kun/log"
+)
 
 // GetOption returns the option for a provider
 func (p *Provider) GetOption(id string) (*ProviderOption, bool) {
@@ -41,3 +49,184 @@ func (p *ProviderOption) Parse(v interface{}) error {
 
 	return nil
 }
+
+// LoadProviders loads providers from directories with language support
+func LoadProviders(basePath string) (*ProviderConfig, error) {
+	config := &ProviderConfig{
+		Chunkings:  make(map[string][]*Provider),
+		Embeddings: make(map[string][]*Provider),
+		Converters: make(map[string][]*Provider),
+		Extractors: make(map[string][]*Provider),
+		Fetchers:   make(map[string][]*Provider),
+		Searchers:  make(map[string][]*Provider),
+		Rerankers:  make(map[string][]*Provider),
+		Votes:      make(map[string][]*Provider),
+		Weights:    make(map[string][]*Provider),
+		Scores:     make(map[string][]*Provider),
+	}
+
+	// Provider type directories to load
+	providerTypes := []string{
+		"chunkings", "embeddings", "converters", "extractions",
+		"fetchers", "searchers", "rerankers", "votes", "weights", "scores",
+	}
+
+	for _, providerType := range providerTypes {
+		err := loadProviderType(basePath, providerType, config)
+		if err != nil {
+			log.Warn("[Knowledge Base] Failed to load %s providers: %v", providerType, err)
+		}
+	}
+
+	return config, nil
+}
+
+// loadProviderType loads providers for a specific type from language files
+func loadProviderType(basePath, providerType string, config *ProviderConfig) error {
+	providerDir := filepath.Join(basePath, providerType)
+
+	// Check if directory exists
+	exists, err := application.App.Exists(providerDir)
+	if err != nil {
+		return err
+	}
+	if !exists {
+		log.Debug("[Knowledge Base] Provider directory %s not found, skipping", providerDir)
+		return nil
+	}
+
+	// Use Walk to find all provider files in the provider directory
+	err = application.App.Walk(providerDir, func(root, filename string, isdir bool) error {
+		if isdir {
+			return nil
+		}
+
+		// Skip non-yao files
+		if !strings.HasSuffix(filename, ".yao") {
+			return nil
+		}
+
+		// Extract language from filename (e.g., "en.yao" -> "en")
+		baseName := filepath.Base(filename)
+		language := strings.TrimSuffix(baseName, ".yao")
+
+		// Load providers for this language
+		providers, err := loadProvidersForLanguage(providerDir, baseName)
+		if err != nil {
+			log.Warn("[Knowledge Base] Failed to load %s providers for language %s: %v", providerType, language, err)
+			return nil // Continue processing other files
+		}
+
+		// Store providers in the appropriate map
+		switch providerType {
+		case "chunkings":
+			config.Chunkings[language] = providers
+		case "embeddings":
+			config.Embeddings[language] = providers
+		case "converters":
+			config.Converters[language] = providers
+		case "extractions":
+			config.Extractors[language] = providers
+		case "fetchers":
+			config.Fetchers[language] = providers
+		case "searchers":
+			config.Searchers[language] = providers
+		case "rerankers":
+			config.Rerankers[language] = providers
+		case "votes":
+			config.Votes[language] = providers
+		case "weights":
+			config.Weights[language] = providers
+		case "scores":
+			config.Scores[language] = providers
+		}
+
+		log.Debug("[Knowledge Base] Loaded %d %s providers for language %s", len(providers), providerType, language)
+		return nil
+	}, "*.yao")
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// loadProvidersForLanguage loads providers from a specific language file
+func loadProvidersForLanguage(providerDir, filename string) ([]*Provider, error) {
+	filePath := filepath.Join(providerDir, filename)
+
+	// Read the file
+	data, err := application.App.Read(filePath)
+	if err != nil {
+		return nil, err
+	}
+
+	// Parse as array of providers
+	var providers []*Provider
+	err = application.Parse(filename, data, &providers)
+	if err != nil {
+		return nil, err
+	}
+
+	return providers, nil
+}
+
+// GetProviders returns providers for a specific type and language with fallback to "en"
+func (pc *ProviderConfig) GetProviders(providerType, language string) []*Provider {
+	if pc == nil {
+		return []*Provider{}
+	}
+
+	var providerMap map[string][]*Provider
+	switch providerType {
+	case "chunking":
+		providerMap = pc.Chunkings
+	case "embedding":
+		providerMap = pc.Embeddings
+	case "converter":
+		providerMap = pc.Converters
+	case "extractor":
+		providerMap = pc.Extractors
+	case "fetcher":
+		providerMap = pc.Fetchers
+	case "searcher":
+		providerMap = pc.Searchers
+	case "reranker":
+		providerMap = pc.Rerankers
+	case "vote":
+		providerMap = pc.Votes
+	case "weight":
+		providerMap = pc.Weights
+	case "score":
+		providerMap = pc.Scores
+	default:
+		return []*Provider{}
+	}
+
+	// Try to get providers for the requested language
+	if providers, exists := providerMap[language]; exists && len(providers) > 0 {
+		return providers
+	}
+
+	// Fallback to "en" if requested language not found
+	if language != "en" {
+		if providers, exists := providerMap["en"]; exists && len(providers) > 0 {
+			return providers
+		}
+	}
+
+	return []*Provider{}
+}
+
+// GetProvider returns a specific provider by ID, type, and language with fallback to "en"
+func (pc *ProviderConfig) GetProvider(providerType, id, language string) (*Provider, error) {
+	providers := pc.GetProviders(providerType, language)
+
+	for _, provider := range providers {
+		if provider.ID == id {
+			return provider, nil
+		}
+	}
+
+	return nil, fmt.Errorf("provider %s not found for type %s and language %s", id, providerType, language)
+}
diff --git a/kb/types/types.go b/kb/types/types.go
index ecba3793..4011d2b4 100644
--- a/kb/types/types.go
+++ b/kb/types/types.go
@@ -75,22 +75,28 @@ type Config struct {
 	// Concurrency limits for task processing (Optional)
 	Limits *LimitsConfig `json:"limits,omitempty" yaml:"limits,omitempty"`
 
-	// Provider configurations
-	Chunkings  []*Provider `json:"chunkings" yaml:"chunkings"`                       // Text splitting providers (Required - at least one)
-	Embeddings []*Provider `json:"embeddings" yaml:"embeddings"`                     // Text vectorization providers (Required - at least one)
-	Converters []*Provider `json:"converters,omitempty" yaml:"converters,omitempty"` // File processing converters (Optional)
-	Extractors []*Provider `json:"extractors,omitempty" yaml:"extractors,omitempty"` // Entity and relationship extractors (Optional)
-	Fetchers   []*Provider `json:"fetchers,omitempty" yaml:"fetchers,omitempty"`     // File fetchers (Optional)
-	Searchers  []*Provider `json:"searchers,omitempty" yaml:"searchers,omitempty"`   // Search providers (Optional)
-	Rerankers  []*Provider `json:"rerankers,omitempty" yaml:"rerankers,omitempty"`   // Reranking providers (Optional)
-	Votes      []*Provider `json:"votes,omitempty" yaml:"votes,omitempty"`           // Voting providers (Optional)
-	Weights    []*Provider `json:"weights,omitempty" yaml:"weights,omitempty"`       // Weighting providers (Optional)
-	Scores     []*Provider `json:"scores,omitempty" yaml:"scores,omitempty"`         // Scoring providers (Optional)
+	// Multi-language provider configurations (loaded from directories)
+	Providers *ProviderConfig `json:"-"` // Loaded from provider directories, not serialized
 
 	// Feature flags (computed during parsing, not serialized)
 	Features Features `json:"-"`
 }
 
+// ProviderConfig holds providers organized by language
+type ProviderConfig struct {
+	// Provider configurations by language (e.g., "en", "zh-cn")
+	Chunkings  map[string][]*Provider `json:"-"` // Text splitting providers by language
+	Embeddings map[string][]*Provider `json:"-"` // Text vectorization providers by language
+	Converters map[string][]*Provider `json:"-"` // File processing converters by language
+	Extractors map[string][]*Provider `json:"-"` // Entity and relationship extractors by language
+	Fetchers   map[string][]*Provider `json:"-"` // File fetchers by language
+	Searchers  map[string][]*Provider `json:"-"` // Search providers by language
+	Rerankers  map[string][]*Provider `json:"-"` // Reranking providers by language
+	Votes      map[string][]*Provider `json:"-"` // Voting providers by language
+	Weights    map[string][]*Provider `json:"-"` // Weighting providers by language
+	Scores     map[string][]*Provider `json:"-"` // Scoring providers by language
+}
+
 // VectorConfig represents vector database configuration
 type VectorConfig struct {
 	Driver string                 `json:"driver" yaml:"driver"` // Required, currently only support "qdrant"
diff --git a/openapi/kb/provider.go b/openapi/kb/provider.go
index 069ee137..1f741b99 100644
--- a/openapi/kb/provider.go
+++ b/openapi/kb/provider.go
@@ -12,7 +12,7 @@ import (
 // GetProviders get all providers
 func GetProviders(c *gin.Context) {
 	providerType := c.Param("providerType")
-	locale := c.Query("locale")
+	locale := strings.ToLower(c.Query("locale"))
 	if locale == "" {
 		locale = "en"
 	}
@@ -48,7 +48,7 @@ func GetProviders(c *gin.Context) {
 func GetProviderSchema(c *gin.Context) {
 	providerType := c.Param("providerType")
 	providerID := c.Param("providerID")
-	locale := c.Query("locale")
+	locale := strings.ToLower(c.Query("locale"))
 	if locale == "" {
 		locale = "en"
 	}
@@ -62,7 +62,7 @@ func GetProviderSchema(c *gin.Context) {
 		return
 	}
 
-	provider, err := kb.GetProvider(providerType, providerID)
+	provider, err := kb.GetProviderWithLanguage(providerType, providerID, locale)
 	if err != nil {
 		errorResp := &response.ErrorResponse{
 			Code:             response.ErrServerError.Code,
diff --git a/openapi/kb/utils.go b/openapi/kb/utils.go
index 3321b421..0bd10531 100644
--- a/openapi/kb/utils.go
+++ b/openapi/kb/utils.go
@@ -15,13 +15,14 @@ Usage Examples:
 1. AddFile API (converter will be auto-detected based on file info):
 {
   "collection_id": "my_collection",
+  "locale": "en",
   "file_id": "uploaded_file_123",
   "chunking": {
-    "provider_id": "text_splitter",
-    "option_id": "default"
+    "provider_id": "__yao.structured",
+    "option_id": "standard"
   },
   "embedding": {
-    "provider_id": "openai",
+    "provider_id": "__yao.openai",
     "option_id": "text-embedding-3-small"
   },
   "doc_id": "document_001",
@@ -30,34 +31,39 @@ Usage Examples:
   }
 }
 
-2. AddText API:
+2. AddText API with Chinese locale:
 {
   "collection_id": "my_collection",
-  "text": "This is the text content to be processed.",
+  "locale": "zh-cn",
+  "text": "这是要处理的文本内容。",
   "chunking": {
-    "provider_id": "text_splitter"
+    "provider_id": "__yao.structured"
   },
   "embedding": {
-    "provider_id": "openai"
+    "provider_id": "__yao.fastembed",
+    "option_id": "fastembed-chinese"
   }
 }
 
 3. AddSegments API:
 {
   "collection_id": "my_collection",
+  "locale": "en",
   "doc_id": "document_001",
   "segment_texts": [
     {"text": "First segment", "metadata": {"page": 1}},
     {"text": "Second segment", "metadata": {"page": 2}}
   ],
   "embedding": {
-    "provider_id": "openai",
+    "provider_id": "__yao.openai",
     "option_id": "text-embedding-3-small"
   }
 }
 
 Note:
+- If no locale is specified, defaults to "en"
 - If no option_id is specified, the default option from provider configuration will be selected
+- Providers are loaded based on locale with fallback to "en" if the specified locale is not available
 - For AddFile API, converter will be auto-detected based on filename and content_type obtained from GetFileInfo(file_id)
 - ToUpsertOptions() can be called without parameters, or with filename and contentType for converter auto-detection
 */
@@ -76,6 +82,9 @@ type BaseUpsertRequest struct {
 	// Collection ID - this will be mapped to UpsertOptions.CollectionID
 	CollectionID string `json:"collection_id" binding:"required"`
 
+	// Language/locale for provider selection (defaults to "en")
+	Locale string `json:"locale,omitempty"`
+
 	// Provider configurations
 	Chunking   *ProviderConfig `json:"chunking" binding:"required"`
 	Embedding  *ProviderConfig `json:"embedding" binding:"required"`
@@ -123,7 +132,7 @@ type UpdateSegmentsRequest struct {
 // If OptionID is provided, it looks up the option from the provider
 // If Option is provided directly, it uses the Option field
 // If neither is provided, it selects the default option from provider's Options
-func resolveProviderOption(config *ProviderConfig) (*kbtypes.ProviderOption, error) {
+func resolveProviderOption(config *ProviderConfig, locale string) (*kbtypes.ProviderOption, error) {
 	if config == nil {
 		return nil, fmt.Errorf("provider config is required")
 	}
@@ -142,20 +151,20 @@ func resolveProviderOption(config *ProviderConfig) (*kbtypes.ProviderOption, err
 		return nil, fmt.Errorf("KB instance is not initialized")
 	}
 
-	// Find the provider in KB config
-	var provider *kbtypes.Provider
-	kbConfig := kb.Instance.(*kb.KnowledgeBase).Config
-
-	// Check all provider types to find the matching provider
-	allProviders := [][]*kbtypes.Provider{
-		kbConfig.Chunkings,
-		kbConfig.Embeddings,
-		kbConfig.Converters,
-		kbConfig.Extractors,
-		kbConfig.Fetchers,
+	// Default locale to "en" if not provided
+	if locale == "" {
+		locale = "en"
 	}
 
-	for _, providers := range allProviders {
+	// Find the provider using the new multi-language system
+	var provider *kbtypes.Provider
+	kbInstance := kb.Instance.(*kb.KnowledgeBase)
+
+	// Check all provider types to find the matching provider
+	providerTypes := []string{"chunking", "embedding", "converter", "extractor", "fetcher"}
+
+	for _, providerType := range providerTypes {
+		providers := kbInstance.Providers.GetProviders(providerType, locale)
 		for _, p := range providers {
 			if p.ID == config.ProviderID {
 				provider = p
@@ -168,7 +177,7 @@ func resolveProviderOption(config *ProviderConfig) (*kbtypes.ProviderOption, err
 	}
 
 	if provider == nil {
-		return nil, fmt.Errorf("provider %s not found", config.ProviderID)
+		return nil, fmt.Errorf("provider %s not found for locale %s", config.ProviderID, locale)
 	}
 
 	// If OptionID is provided, look it up from the provider
@@ -207,6 +216,12 @@ func (r *BaseUpsertRequest) ToUpsertOptions(fileInfo ...string) (*types.UpsertOp
 		contentType = fileInfo[1]
 	}
 
+	// Default locale to "en" if not specified
+	locale := r.Locale
+	if locale == "" {
+		locale = "en"
+	}
+
 	options := &types.UpsertOptions{
 		CollectionID: r.CollectionID, // Collection ID maps to CollectionID
 		DocID:        r.DocID,
@@ -214,7 +229,7 @@ func (r *BaseUpsertRequest) ToUpsertOptions(fileInfo ...string) (*types.UpsertOp
 	}
 
 	// Resolve and create chunking provider
-	chunkingOption, err := resolveProviderOption(r.Chunking)
+	chunkingOption, err := resolveProviderOption(r.Chunking, locale)
 	if err != nil {
 		return nil, fmt.Errorf("failed to resolve chunking provider: %w", err)
 	}
@@ -233,7 +248,7 @@ func (r *BaseUpsertRequest) ToUpsertOptions(fileInfo ...string) (*types.UpsertOp
 	options.ChunkingOptions = chunkingOpts
 
 	// Resolve and create embedding provider
-	embeddingOption, err := resolveProviderOption(r.Embedding)
+	embeddingOption, err := resolveProviderOption(r.Embedding, locale)
 	if err != nil {
 		return nil, fmt.Errorf("failed to resolve embedding provider: %w", err)
 	}
@@ -246,7 +261,7 @@ func (r *BaseUpsertRequest) ToUpsertOptions(fileInfo ...string) (*types.UpsertOp
 
 	// Optional providers
 	if r.Extraction != nil {
-		extractionOption, err := resolveProviderOption(r.Extraction)
+		extractionOption, err := resolveProviderOption(r.Extraction, locale)
 		if err != nil {
 			return nil, fmt.Errorf("failed to resolve extraction provider: %w", err)
 		}
@@ -259,7 +274,7 @@ func (r *BaseUpsertRequest) ToUpsertOptions(fileInfo ...string) (*types.UpsertOp
 	}
 
 	if r.Fetcher != nil {
-		fetcherOption, err := resolveProviderOption(r.Fetcher)
+		fetcherOption, err := resolveProviderOption(r.Fetcher, locale)
 		if err != nil {
 			return nil, fmt.Errorf("failed to resolve fetcher provider: %w", err)
 		}
@@ -274,7 +289,7 @@ func (r *BaseUpsertRequest) ToUpsertOptions(fileInfo ...string) (*types.UpsertOp
 	// Handle converter - auto-detect if not specified
 	if r.Converter != nil {
 		// User specified converter
-		converterOption, err := resolveProviderOption(r.Converter)
+		converterOption, err := resolveProviderOption(r.Converter, locale)
 		if err != nil {
 			return nil, fmt.Errorf("failed to resolve converter provider: %w", err)
 		}
@@ -297,7 +312,7 @@ func (r *BaseUpsertRequest) ToUpsertOptions(fileInfo ...string) (*types.UpsertOp
 				ProviderID: converterID,
 			}
 
-			converterOption, err := resolveProviderOption(converterConfig)
+			converterOption, err := resolveProviderOption(converterConfig, locale)
 			if err != nil {
 				return nil, fmt.Errorf("failed to resolve auto-detected converter provider: %w", err)
 			}
diff --git a/widgets/app/app.go b/widgets/app/app.go
index 47380003..7f82d4cc 100644
--- a/widgets/app/app.go
+++ b/widgets/app/app.go
@@ -22,6 +22,7 @@ import (
 	"github.com/yaoapp/yao/data"
 	"github.com/yaoapp/yao/i18n"
 	"github.com/yaoapp/yao/kb"
+	kbtypes "github.com/yaoapp/yao/kb/types"
 	"github.com/yaoapp/yao/neo"
 	"github.com/yaoapp/yao/neo/assistant"
 	"github.com/yaoapp/yao/openapi"
@@ -599,74 +600,62 @@ func processXgen(process *process.Process) interface{} {
 	kbConfig := map[string]interface{}{}
 	if kb.Instance != nil {
 		if knowledgebase, ok := kb.Instance.(*kb.KnowledgeBase); ok && knowledgebase.Config != nil {
-			chunkings := []string{}
-			if knowledgebase.Config.Chunkings != nil {
-				for _, chunking := range knowledgebase.Config.Chunkings {
-					chunkings = append(chunkings, chunking.ID)
-				}
+			// Use the current language setting for provider selection
+			currentLang := lang
+			if currentLang == "" {
+				currentLang = "en" // Default to English
 			}
 
-			embeddings := []string{}
-			if knowledgebase.Config.Embeddings != nil {
-				for _, embedding := range knowledgebase.Config.Embeddings {
-					embeddings = append(embeddings, embedding.ID)
+			// Helper function to extract provider IDs from multi-language providers
+			extractProviderIDs := func(providerMap map[string][]*kbtypes.Provider) []string {
+				ids := []string{}
+				if providerMap == nil {
+					return ids
 				}
+
+				// Try current language first
+				if providers, exists := providerMap[currentLang]; exists {
+					for _, provider := range providers {
+						ids = append(ids, provider.ID)
+					}
+					return ids
+				}
+
+				// Fallback to English
+				if currentLang != "en" {
+					if providers, exists := providerMap["en"]; exists {
+						for _, provider := range providers {
+							ids = append(ids, provider.ID)
+						}
+						return ids
+					}
+				}
+
+				// If no providers found for current language or English, return all available
+				for _, providers := range providerMap {
+					for _, provider := range providers {
+						ids = append(ids, provider.ID)
+					}
+					break // Just take the first available language
+				}
+
+				return ids
 			}
 
-			converters := []string{}
-			if knowledgebase.Config.Converters != nil {
-				for _, converter := range knowledgebase.Config.Converters {
-					converters = append(converters, converter.ID)
-				}
-			}
+			var chunkings, embeddings, converters, extractors, fetchers []string
+			var searchers, rerankers, votes, weights, scores []string
 
-			extractors := []string{}
-			if knowledgebase.Config.Extractors != nil {
-				for _, extractor := range knowledgebase.Config.Extractors {
-					extractors = append(extractors, extractor.ID)
-				}
-			}
-
-			fetchers := []string{}
-			if knowledgebase.Config.Fetchers != nil {
-				for _, fetcher := range knowledgebase.Config.Fetchers {
-					fetchers = append(fetchers, fetcher.ID)
-				}
-			}
-
-			searchers := []string{}
-			if knowledgebase.Config.Searchers != nil {
-				for _, searcher := range knowledgebase.Config.Searchers {
-					searchers = append(searchers, searcher.ID)
-				}
-			}
-
-			rerankers := []string{}
-			if knowledgebase.Config.Rerankers != nil {
-				for _, reranker := range knowledgebase.Config.Rerankers {
-					rerankers = append(rerankers, reranker.ID)
-				}
-			}
-
-			votes := []string{}
-			if knowledgebase.Config.Votes != nil {
-				for _, vote := range knowledgebase.Config.Votes {
-					votes = append(votes, vote.ID)
-				}
-			}
-
-			weights := []string{}
-			if knowledgebase.Config.Weights != nil {
-				for _, weight := range knowledgebase.Config.Weights {
-					weights = append(weights, weight.ID)
-				}
-			}
-
-			scores := []string{}
-			if knowledgebase.Config.Scores != nil {
-				for _, score := range knowledgebase.Config.Scores {
-					scores = append(scores, score.ID)
-				}
+			if knowledgebase.Providers != nil {
+				chunkings = extractProviderIDs(knowledgebase.Providers.Chunkings)
+				embeddings = extractProviderIDs(knowledgebase.Providers.Embeddings)
+				converters = extractProviderIDs(knowledgebase.Providers.Converters)
+				extractors = extractProviderIDs(knowledgebase.Providers.Extractors)
+				fetchers = extractProviderIDs(knowledgebase.Providers.Fetchers)
+				searchers = extractProviderIDs(knowledgebase.Providers.Searchers)
+				rerankers = extractProviderIDs(knowledgebase.Providers.Rerankers)
+				votes = extractProviderIDs(knowledgebase.Providers.Votes)
+				weights = extractProviderIDs(knowledgebase.Providers.Weights)
+				scores = extractProviderIDs(knowledgebase.Providers.Scores)
 			}
 
 			kbConfig = map[string]interface{}{