"He has too many children."
Translation:Má příliš mnoho dětí.
It shouldn't. You can use "hodně" for "many", but you can't say "příliš hodně".
But duo accepted přílíš hodně, so if not acceptable thw word bank may need to change.
The word bank contains only the words that are in the "main" translation, which is the one at the top of the discussion page. Others are accepted when using the keyboard.