As I did not find another place to report I'll do it here: the speech does not correspond to the word "Čí" when hovering the cursor over it. Example can be checked in sentence "Či jsou ta vajíčka ?".
"nelze nalézt text k předčítání" - "impossible to find a text to read". We will try to report it further.
It works for me (now?) but it says "vájíčka", I know there's probably nothing to be done about it, just leaving it here in case there are some confused students. :)
I wrote "Whose eggs are these?" and it was marked wrong. Is this a mistake, or am I missing something?