Update app.py

app.py

@@ -734,7 +734,7 @@ def translate(txt,to_lang="en",from_lang=False):
             if len(chunk) > 490:
                 _words = chunk.split()
                 words = [_words[-1], *words]
-                chunk = _words[:-1]
+                chunk = " ".join(_words[:-1])
             translation = translation + " " + translator.translate(chunk)
     else:
         translation = translator.translate(txt)