In OpenStreetMap, many features have localized name tags. name:en=some_english_name, name:de=some_german_name, etc.
One of the advantages of vector basemaps, in my opinion, is the ability to have multiple attributes available and to adjust what and how things are labelled. This is especially useful in the case of localization, providing a map in a given user's chosen language.
I know this sort of change would increase storage and mess with the underlying schema, but I think it would be a good move for the vector tiles to have access to other languages' name tags.