For many years, garmin had shown appalling korean tranlation for their mobile apps (and connect website)
many many translation does not make any sense at all, and have very hard time understainding it.
Much worse than even google automatic translation..
I don't really have any expectations that the translations will get any better, any many people here find the english version better (even though we are native koreans)..
But currently, the GCM app language is force tied to system app language.
Obviously, for most koreans, system app settings is in korean, because only GCM needs to be english, not everything.
Android 13 allows per-app language settings, but this has to enabled in the app. Which GCM currently does not allow.
https://developer.android.com/guide/topics/resources/app-languages