It's weird bc Looking it up in a couple good Latin dictionaries, (Latin Lexicon is a nice one), we can find "Non" as a stand-alone negation in Classical Latin.
So, like, yes, depending on the period, like most ancient languages you usually have to repeat and negate tye verb or use an adverb with the right force and flavor---but we're over a thousand years past Latin being a living language. If Duolingo wants tjis course to prep for reading period texts, then it needs to Do Better with negations and such.
If Duolingo is just providing this course for people who are learning Latin on a lark...it should just use "non". Some Romans did it, literally all her daughter languages did it, and it's what learners naturally reach for. It's fine.
The Romans aren't going to rise from their graves and devour us just because you used "non" as a catch-all for "no" in order to easy beginners into the language.
As, I didn't understand what you mean, because I'm only a beginner, I searched a little, I've found that:
[In Classical Latin, there were no words exactly corresponding to "yes" and "no". Non and ne were negatives, but they needed to combine with other words (like "not" in English).
There were, however, particles which could be used to agree with something. Both ita and sīc meant "thus", and became words for "yes" in the Romance languages. So if someone asked if you were lost, for example, you could respond "Ita!" ("It is so!"). For a stronger "yes", add vērō ("truly").
"No" on its own was a bit more unwieldy to express. Minimē is "not at all", minimē vērō even stronger. Negō means "I deny it!", nōlī is "don't!".
Another way to respond to a yes/no question is to repeat the verb, in the positive for "yes" and in the negative for "no". So if someone asked "are you lost?" you could say "I am" (sum) or "I'm not" (non sum).]
[immo is also a great way to oppose the speaker's statement if it is not a question. "Fortis sum! --Immo ignavus es!" –]
[At least in a few cases, I have been taught that Ita or ita vero is correct for yes. I have seen it used when answering questions. As (...) pointed out [previously], Ita means it is so, and vero means truly or something like that. However, ita seems to be a shorter, more casual form, not different in strength. Another tactic I have seen (rarely) is to just reply with a verb. In English, this would look like: Do you speak Latin? I speak it. A standard form of no (at least for beginners) is minime.]
You could also use ‘immo’, which is quite emphatic and means something like ‘no, on the contrary’.
Confusingly, though, it was at times used to indicate the speaker to which one answers was not so much wrong as erred by understating something.
You could use ‘immo’ to answer both these questions: ‘is Rome a small village’ (on the contrary, it’s the biggest city in the known world) and ‘is Rome a big city?’ (it’s more than big, it’s positively enormous).
The voices are three of our contributors, not computer voices. They also did quite a good job at recording sentences for the beta course.
Keep in mind these sentence discussions are here to discuss the actual sentences, not report any audio errors you may find. That's what the report button is for.