How to say in Czech: They are learning Slovenian.

English
are learning
Czech
Oni se učí slovinsky.
Are they learning Slovenian?
Are they learning Slovenian on their own?
Where did they learn Slovenian?
Do they speak Slovenian?
They do not speak Slovenian.
They do not speak Slovenian very well.
They speak only a little Slovenian.
They speak Slovenian.
They speak Slovenian fluently.
They speak Slovenian very well.

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