OpenType language system tag: `APPH` https://www.microsoft.com/typography/otspec/languagetags.htm IETF BCP47 variant tag: `fonnapa` http://www.iana.org/assignments/language-subtag-registry/language-subtag-registry
OpenType language system tag: `APPH` https://www.microsoft.com/typography/otspec/languagetags.htm IETF BCP47 variant tag: `fonnapa` http://www.iana.org/assignments/language-subtag-registry/language-subtag-registry