Subtitles are transcriptions of words given at the bottom of a video in a language understood by the viewers. They can be used to help deaf or hard-of-hearing viewers follow along with what's being said, and they can also be helpful for people who want to learn a foreign language.

Vietnamese subtitling services are now widely available by various transcription services and subtitling companies worldwide. Hiring a reliable subtitling service can provide a great way to reach multiple audiences who speak different languages.

The website of the Korean show subtitling team, iSubs, is (see related link).

"Raw" since it has not gone through the translation/dubbing/subtitling process . Purely a Japanese work without editing for an international audience .

That would most likely be referring to original Japanese episodes in raw form, ie, direct TV or DVD rips without any kind of subtitling.