It's been two years (?) since the release of multi-lingual name system, which should have resulted in major changes to our Coalitions of Naming Conventions projects. For those profiles that only need one name (in whatever language), there isn't much incentive to move the data to the correct tab (until very recently for surname-first languages). For those profiles that are truly multi-lingual, there have been some debates on the medieval tree, but things are left open. Yet many profiles that should turn multi-lingual have not seen any changes. Let me start off with three examples, all happen to be from Poland but lived elsewhere for parts of their lives.
Frédéric Chopin
Marie Curie, Nobel Prizes in Physics (1903) and Chemistry (1911)
Nicolaus Copernicus, Jr.
See if you agree with the changes I made. I like to use wikipedia, where a mouse-over the language links gives a quick idea what other languages use. The most common spelling deserves to be in English (default).
Instead of proposing rules, let's focus on actual examples.
In case you haven't noticed, Hungarian language now correctly puts surname before their given names, so it will be a big incentive to start using the Hungarian tab. For example,