Talk:Off Colors (group)/@comment-24985387-20170602221115/@comment-31509668-20170607034231

From the perspective of a TV show, the dialogue must be understandable to the audience. Therefore in the United States the dialogue will be in English even in situations where you know the characters aren't speaking English. If you're watching a movie set in France about Napoleon the cast will be speaking English even though you know everyone would be speaking french. It's either that or use french dialogue and subtitles.

From an in universe perspective we know that English didn't develop in Steven's world because the history of his Earth is radically different from the history of ours. Since Lars can talk to gems without need of a translator we have to surmise that on Steven's Earth the dominant language is some form of the gem language.