import { type LanguageCode } from "https://deno.land/x/iso639_1@1.2.20090901/src/mod.ts";
The string literal type of all valid language codes. This type contains only the two-letter language codes defined in ISO 3166-1 with lower case.
You can narrow down the string type to this type using the following functions: isLanguageCode, parseLanguageCode, and validateLanguageCode.