Translation:The man speaks both Vietnamese and English.
I assume this can also be used for lists of greater than 2 yeah? so, tôi nói cả tiếng anh, tiếng việt và tiếng đức.
This has to do with English, not Vietnamese. "I talk both Vietnamese and English" is awkward. You can say "I talk in both languages, Vietnamese and English." You talk to, you talk in, you talk about, you CANNOT talk languages.
How do we find the lesson notes on an android phone? I am rarely at a computer.