Update app.py

app.py

@@ -282,8 +282,9 @@ def demo():
                                 type="value", info="Choose your language",interactive = True)
             lang_btn.select(intitalize_lang, inputs = lang_btn)
         
-        chatbot = gr.Chatbot(height=300, preprocess = english_to_indian, postprocess =  indian_to_english)
-
+        chatbot = gr.Chatbot(height=300)
+        chatbot.change(preprocess = english_to_indian, postprocess =  indian_to_english)
+        
         with gr.Row():
             msg = gr.Textbox(placeholder="Type message", container=True)    
         with gr.Accordion("References", open=False):