fix: no dialect language can't run bug

app.py

@@ -107,15 +107,18 @@ def use_default_emb_or_custom_radio_input(use_default_emb_or_custom):
 
 def language_radio_changed(language):
     if language in g2p:
-        return gr.update(visible=False)
-    dialect_choices = [
-        (tag.split("_")[1], tag.split("_")[1]) for tag in g2p.keys() if language in tag
-    ]
+        dialect_choices = [("None", "")]
+    else:
+        dialect_choices = [
+            (tag.split("_")[1], tag.split("_")[1])
+            for tag in g2p.keys()
+            if language in tag
+        ]
     return gr.update(
         choices=dialect_choices,
-        value=dialect_choices[0],
+        value=dialect_choices[0][1],
         interactive=len(dialect_choices) > 1,
-        visible=True,
+        visible=language not in g2p,
     )
 
 
@@ -124,6 +127,7 @@ def update_example(language):
 
     if language in g2p:
         component_props[0]["visible"] = False
+        component_props[0]["choices"] = [("None", "")]
     else:
         component_props[0]["visible"] = True
         component_props[0]["choices"] = [