"Umíš míň anglických slov než moje malá sestra."

Translation: You know fewer English words than my little sister.

[BrianG1941]

Why is 'less' in place of 'fewer' not allowed here. I have reported it in case.

[VladaFu]

Sometimes is hard to say when the usage, which is against widespread grammatical rules (https://www.grammarly.com/blog/fewer-vs-less/), should be accepted is used enogh and when it should be considered an unacceptable (for a language course) colloquialism.

[Nico44415]

I tried looking up 'míň' online but couldn't find anything...

[VladaFu]

http://prirucka.ujc.cas.cz/?slovo=m%C3%A9n%C4%9B