Update app.py

app.py

@@ -42,7 +42,7 @@ iface = gr.Interface(
     fn=process_youtube_url,
     inputs=[
         gr.Textbox(label="YouTube URL", placeholder="https://youtu.be/example"),
-        gr.Dropdown(label="Language",value="ja",choices=["en", "ja", "fr","de","it"],allow_custom_value=True),
+        gr.Dropdown(label="Language",value="ja",choices=["en","en-US", "ja", "fr","de","it"],allow_custom_value=True),
     ],
     outputs=[
         gr.Textbox(label="Loaded Documents / Error Message",show_copy_button=True),