Board Thread:General Discussion/@comment-45295530-20200504220242/@comment-45643731-20200513012938

It's anime. Anime is Japanese, and therefore made in Japan with Japanese voice actors. People who are fluent in Japanese can sub or dub it (subbing is putting the words in English/your language at the bottom of the screen, dubbing is getting English/people who speak your language to yell over the top of them) and make it easier to understand.

Since Bleach is set in Japan, everybody speaks in Japanese. As the first reply states, there are more branches, but we don't hear about those as the anime is set solely in Japan. Therefore, other branches are unimportant, but yes, they are there.