such a sentence does not exist in the Dutch language
I true but the sentence is not correct in Dutch language is zij fiets
The verb "to bike" is rarely used in English. "To ride a bike" is the most common expression.
In the UK most people would say "she doesnt cycle"
Why isn't "She isn't riding her bike" not accepted? Also --off-topic-- is the Dutch course still being updated? Some of the comments are very old.
Not colloquial in either language. Reconsider inclusion.