Requested at https://translatewiki.net/w/i.php?title=Support&oldid=12430506#Localisation_of_Interslavic
- Add to language-data (patch)
- Add to translatewiki configuration (patch)
- Add assistant languages to mw-config/FallbackSettings.php
- Deploy configuration to translatewiki
- Update jquery.uls and jquery.ime in the ULS extension (patch)
- 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