The following language codes exists in Names.php but not language-data:
- sh-cyrl (patch by @Nikki)
- sh-latn (patch by @Nikki)
- wuu-hans (patch by @Amire80)
- wuu-hant (patch by @Amire80)
- yue-hans (patch by @Amire80)
- yue-hant (patch by @Amire80)
They should also be added to Universal Language Selector (jquery.uls)