Requested at https://translatewiki.net/w/i.php?title=Support&oldid=12525839#[msi]_Request_to_add_new_language:_Sabah_Malay_-_'Cakap_Sabah'
Autonym according to Ethnologue and the requester: Bahasa Sabah.
[ ] Add to language-data
-- [ ] Run `src/util/ulsdata2json.php` before adding
-- [ ] Run `src/util/ulsdata2json.php` after adding
[ ] Add to translatewiki configuration
-- [ ] Add assistant languages to `mw-config/FallbackSettings.php` (if needed)
[ ] Deploy configuration to translatewiki
[ ] Update jquery.uls and jquery.ime in the ULS extension
[ ] Deploy ULS to translatewiki
[ ] Create the translatewiki language portal
[ ] Update the translatewiki language portal to indicate that the language is enabled
[ ] Add the requester (and possibly other relevant users) to the translators list on the portal
[ ] Enter the autonym in the Wikimedia Portals project