"No."

Translation: Tidak.

[Mantic0rn]

I like "nggak" should be added as an acceptable answer. I feel like it's very commonly used as an alternative to "tidak."

[lockers001]

Maybe adding a section on commonly used slang would be a good idea; although, slang can sometimes be regional.

[TheLlamanator42]

In the notes before each lesson they could include which region the slang comes from

[PERCE_NEIGE]

It's really not a good idea to teach a language with slang. When I learned English, they didn't teach me "gotta" or "wanna", I learn it in other places.

We have to make the difference between normal language, and slang, it's very important to make the difference between the 2 kinds of languages.

They don't accept "nite" or "gonna" here, so they won't accept "nggak", I think it's very logical.