Update app.py

app.py

@@ -59,7 +59,7 @@ def respond(
     response_vi = translator_en2vi.translate(response)
     logging.info(f"Successfully generated text: {response}")
     
-    return response if detect(response) == 'vi' else response_vi
+    return response if langdetect.detect(response) == 'vi' else response_vi
 
 # Gradio UI
 demo = gr.ChatInterface(fn=respond, theme="soft")