Какую форму глагола использовать? I... ( to speak) french very well.

I speak French very well. Я хорошо говорю по-французски.

Do I speak French very well?

Do I speak French or English very well?

What language do I speak very well?

What do I do very well?

How do I speak French?

Who speaks French very well?

I speak French very well, don\'t I?