How to say in Czech: They are learning Latvian.

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

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