Requested at https://translatewiki.net/w/i.php?title=Support&oldid=12482086#Add_the_Edo_language
Autonym according to Gboard (and confirmed in private communication with the requester): Ẹdo.
[ ] Add to language-data ([[ https://github.com/wikimedia/language-data/pull/351 | patch ]])
-- [v] Run `src/util/ulsdata2json.php` before adding
-- [v] Run `src/util/ulsdata2json.php` after adding
[ ] Add to translatewiki configuration
-- [ ] Add assistant languages to `mw-config/FallbackSettings.php` (if needed)
-- [ ] Configure as `always-export-languages` in `repoconfig.yaml` (if needed; most languages don't need it)
[ ] Deploy configuration to translatewiki
[ ] Add jquery.ime keyboard (if needed)
[ ] 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
[ ] Enter the autonym in the Wikimedia Portals project