How to add a new file type?

[bitterjug]

There's a list of enabled file types in the readme and I'd like to add one.
Where are these file types enabled?
Is it enough to add to src/fileTypes/fileTypeMap.json or is there another step?
Forgive me if this is documented somewhere, I couldn't see it in the FAQ.

[taehwakang]

go to coc-settings.json(Or command :CocConfig) and add your preferred languages into cSpell.enabledLanguageIds.
it seems the language ids you add should be in the list of https://github.com/iamcco/coc-spell-checker/blob/master/src/settings/languageIds.ts