Thread:Support/Chữ Nôm support

I’m interested in starting a localization of MediaWiki in chữ Nôm Vietnamese (vi-Hani). Note that this would have to be a full-blown localization, not a machine-transliterated variant, since there is a many-to-many mapping between quốc ngữ (Latin) words and chữ Nôm characters.

Would starting this localization be just a matter of adding a  to Portal:Vi, or should I file a bug on MediaWiki for chữ Nôm support first?