While the vast majority of Growth features will be translated via TranslateWiki, one outstanding element are page aliases, which are the strings that go in URLs for things like "Special:Homepage", etc. It would be nice, but not critical, if we had a solution to easily translate those.
This has been mentioned and discussed in comments like T246939#6014321 and T234846#5912192, and in the discussions below those comments.
==== Current state
Special page aliases can't be translated on translatewiki. Instead, a developer needs to change them directly in the codebase itself. Note that special page aliases are visible only in URL, in all other places, it's a message that's translated via TWN. With that in mind, it's not very visible. For that reason, I propose to ignore special page aliases in scaling, and just let it live its own life.