diff --git a/chat_service_integration_test.go b/chat_service_integration_test.go
index a7c1e50..db19353 100644
--- a/chat_service_integration_test.go
+++ b/chat_service_integration_test.go
@@ -32,6 +32,9 @@ func (m *mockLLM) DisambiguateBestMatch(ctx context.Context, msg string, candida
 func (m *mockLLM) GetEmbeddings(ctx context.Context, input string) ([]float64, error) {
 	return m.embeddings, m.embeddingErr
 }
+func (m *mockLLM) TranslateToEnglish(ctx context.Context, msg string) (string, error) {
+	return msg, nil
+}
 
 // --- Test VisitDB ---
 type testVisitDB struct {
diff --git a/handlechat_integration_test.go b/handlechat_integration_test.go
index 82e9e95..54249f9 100644
--- a/handlechat_integration_test.go
+++ b/handlechat_integration_test.go
@@ -33,6 +33,9 @@ func (m *mockHandleChatLLM) DisambiguateBestMatch(ctx context.Context, msg strin
 func (m *mockHandleChatLLM) GetEmbeddings(ctx context.Context, input string) ([]float64, error) {
 	return m.embeddings, m.embeddingErr
 }
+func (m *mockHandleChatLLM) TranslateToEnglish(ctx context.Context, msg string) (string, error) {
+	return msg, nil
+}
 
 // mapChatRepo is an in-memory implementation of ChatRepositoryAPI for tests.
 type mapChatRepo struct {
diff --git a/llm_test.go b/llm_test.go
index 83396d5..2a0eed2 100644
--- a/llm_test.go
+++ b/llm_test.go
@@ -47,6 +47,10 @@ func (m *MockLLMClient) GetEmbeddings(ctx context.Context, input string) ([]floa
 	return []float64{0.1, 0.2, 0.3}, nil
 }
 
+func (m *MockLLMClient) TranslateToEnglish(ctx context.Context, message string) (string, error) {
+	return message, nil
+}
+
 func TestNewLLMClientFromEnv(t *testing.T) {
 	tests := []struct {
 		name         string