"Nevím, jestli se dívat."

Translation: I do not know whether to look.

[Christine_nl]

Why is "don't" wrong here?

[kacenka9]

It is not. It is accepted. Sometimes the system tells you there is an error in a word while there is an error elsewhere. I do not think you remember the entire sentence, it would help. Thanks

[Christine_nl]

I wrote " I don't know whether to look." That's why I didn't understand.

[Daku_]

Why is wrong I do not know if to watch?

[BoneheadBass]

Although "if to watch"would be a literal translation of the Czech sentence, it is incorrect in English. "Whether" should be used here.

In English, "if" could be used in phrases like "if I SHOULD watch" or "if I WANT TO watch," but those aren't good translations of the Czech version.