minor fixes

app.py

@@ -93,7 +93,12 @@ def process(in_filename: str, language: str) -> str:
 
 with demo:
     gr.Markdown("Upload audio from disk or record from microphone for recognition")
-    language = gr.inputs.Radio(label="Language", choices=list(models.keys()))
+    language_choices = list(models.keys())
+    language = gr.inputs.Radio(
+        label="Language",
+        choices=language_choices,
+        value=language_choices[0],
+    )
 
     with gr.Tabs():
         with gr.TabItem("Upload from disk"):