Given that some skins might be untranslatable (such as MinervaNeue), it makes more sense to sort them by the following structure:
- default skin
- other ones (by their skin ID)
Because currently, for example, in the Russian Wikipedia because of the preference of Latin sorting to Cyrillic MinervaNeue gets to be a first option, after it are MonoBook and Timeless, and only then Vector (the default skin). I think more sense would be in a more manual sorting that would set the default skin first and then all the options regardless of their translated name.