Is Adder test always the same or is it random each time because learning the the on japanese without know any japanese is going to be difficult for me otherwise

The order of the questions is always the same, but the correct answers are randomized. Knowing basic hiragana and katakana helps, but isn't required. You can also use a cheat sheet like the one I made here: https://www.speedrun.com/moon/guide/3aaxj

Can we separate english and japanese by any chance, if not that is fine

Language doesn't make that much of a difference, and I don't think it's a good idea to divide the boards any further, considering there aren't many runs to begin with.

Alright, I can't wait to finish the game and start speedrunning it! :)