Update app.py

app.py

@@ -7,6 +7,7 @@ model = AutoModelForSeq2SeqLM.from_pretrained("facebook/nllb-200-distilled-600M"
 tokenizer = AutoTokenizer.from_pretrained("facebook/nllb-200-distilled-600M")
 device = 0 if torch.cuda.is_available() else -1
 LANGS = ["ace_Arab", "eng_Latn", "fra_Latn", "spa_Latn", "yue_Hant","zho_Hans","zho_Hant"]
+LANGS_source = ["eng_Latn"]
 
 # Yue Chinese - yue_Hant, Chinese (Simplified)-Zho_Hans, Chinese(Traditional)-zho_Hant
 # https://github.com/facebookresearch/flores/tree/main/flores200#languages-in-flores-200
@@ -23,7 +24,7 @@ demo = gr.Interface(
     fn=translate,
     inputs=[
         gr.components.Textbox(label="Text"),
-        gr.components.Dropdown(label="Source Language", choices=LANGS),
+        gr.components.Dropdown(label="Source Language", choices=LANGS_source),
         gr.components.Dropdown(label="Target Language", choices=LANGS),
     ],
     outputs=["text"],