"Teacher, what kind of language is German?"
Translation:Opettaja, millainen kieli saksa on?
A name? Do you mean title? People who teach are called teachers, unless they want to be called professors etc. In the English speaking world it's common to refer to a teacher as "mrs" + last name, "mr" + last name, "sir" etc., or indeed "teacher". In Finnish schools children use their teachers' first names or say "opettaja" or "ope".