How to say in Czech: They speak only a little Finnish.

English
speak only a little
Czech
Oni mluví jen trochu finsky.
Do they speak Finnish?
They do not speak Finnish.
They do not speak Finnish very well.
They speak Finnish.
They speak Finnish fluently.
They speak Finnish very well.
Does anybody here speak Finnish?
Are they Finnish?
Are they learning Finnish?
Are they learning Finnish on their own?

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