Or Japonic? Most of kanji transliterations on the Internet are Japanese based, but since Japanese is an isolate language of unknown origin[1], they might sound weird in the bulk of East Asia where Chinese languages are predominantly spoken or otherwise not insignificant.

1: Technically not; languages in rural Japanese islands are no longer considered dialects, and as such the language is not the sole member of its family. The origin is still unknown.

That is how it's written in Japanese (technically shuumai), and you know how programmers love to name things after random Japanese words.

Shumai is a Mandarin Chinese romanization of the name of a dim sum dish. Dim sum in general is a southern / Cantonese tradition. It’s typically siumai in Cantonese.

Filipino here. it's a slang term for dimsum food! haha.

We spell it as siomai though.