Supported languages for detection, keyed by their ISO 639-1 code.
Unknown uses 'und' ("undetermined"), the same token franc,
Intl, and BCP-47 tooling use when a language can't be determined --
not itself an ISO 639-1 code, since ISO 639-1 only covers real languages.
Supported languages for detection, keyed by their ISO 639-1 code.
Unknownuses'und'("undetermined"), the same tokenfranc,Intl, and BCP-47 tooling use when a language can't be determined -- not itself an ISO 639-1 code, since ISO 639-1 only covers real languages.