try textbox.input

app.py

@@ -62,9 +62,9 @@ def opus_trans(message, result_lang, target_lang):
     return translated
 
 
-article = gr.Textbox().content
+article = gr.Textbox()
 lang_select = gr.Dropdown(["en", "zh"])
-lang_detect = detect_lang(article, lang_select)
+lang_detect = detect_lang(article.input, lang_select)
 translate = gr.Interface(
     opus_trans,
     [