JP+KR comms

What language is used in JP teams with Korean players?
English? or Japanese? if Japanese how similar is it to Korean?

idk. but japanese is totally different from Korean

Japanese is not similar to korean.... but they most probably talk in japanese.... many korean learn japanese....

Japanese. Sometimes one Korean player will comm to the other in Korean though (like Astell and Seoldam)

Japanese, if it's a team in japan, that means that there are at least 3 jp players, so it's usually japanese comms. Sometimes they have translators or do comms in duos such as Munchkin and Medusa, and Astell and Seoldam.

Korean is not at all intelligible from Japanese. Completely different languages, but it's easier to learn the other if you know one, because they have a lot of similar linguistic features. So they usually just learn Japanese.