Too warm sounds very strange to me, since warm is a moderate temperature. I think "too hot" should also be acccepted.
But it is not too warm, not just too warm. I would rather see warm for teplo and hot for horko.
OK, I'll look at it as a DL convention to distinguish the words even if the English version sounds artificial. The purpose is to learn Czech after all...
We may end up accepting both. Hot seems to be more common, but there are plenty hits for "not too warm".
But at least in Czech I would use them, although not strictly, in different contexts:
"Nebylo příliš teplo." When it was in fact quite cold.
"Nebylo příliš horko." When it was in reasonably warm but simply not overly hot.
Oh, so you would use teplo ironically. That makes perfect sense to me. I think in English it would be similar.
I think ''Ráno nebylo takové teplo'' sounds better as a translation of ''It was not too warm in the morning'' than "Ráno nebylo příliš teplo." and it means the same.
I just translated this as " It was not too hot in the morning" and it was marked as wrong. I feel this answer shoul be also correct. What do you think?
The course generally seems not to accept "this morning" in sentences like this. I’m speculating here, but it seems to me that “in the morning” is less restrictive than “this morning.” “This morning” can refer only to today, while “in the morning” could also appear in a sentence like “It was not too warm in the morning on Wednesday.” Possibly dnes ráno would be used in referring specifically to "this morning."