Why duolingo is so obssesed with sweating?
It's not Duolingo. It's kind of that weird thing with learning extinct/rare languages. Most of translations are about weird, unusual for us stuff. Valyrian is a lot like Latin :)
If you read the lightbulbs at the beginning of the lessons, you will get information that will tell you what to expect.
What's the defrence between "vala" and "valã"
which one is men and which one is man
Vala with that thing above second A means that in front of the word there is "and"
And in the documentation valā is Locative Singular. I don't see how that sentence indicated location.
What is a sweating?
Why can't I translate to "Boy and man are sweating"?
We don't say say just "boy" without an article ("the"/"a"), in English normally, so the translation needs to be the standard form of the language :)