Hello ! Is "co čekáš na to ?" correct or not, and why ? Thanks !
It is wrong. You certainly need "na co" and there is no place for "to" in the sentence. The answer shown above is certainly the most natural translation.
If this were interpreted as "why are you waiting", would the Czech for that be "proč čekáš" as well or is there another construction that better mirrors the English?
Yep, that would be 'proč čekáš.'
Then as the English can be interpreted comme ça parfaitement bien, il manque une traduction ;)
Qu'est ce que vous attendez ? Interesting that French would use a pronoun, whereas Czech 'has no place for to'.