Plenty of countries have relatively strict laws about legal names. https://en.wikipedia.org/wiki/Naming_law https://en.wikipedia.org/wiki/Naming_law Furthermo

Plenty of countries have relatively strict laws about legal names. https://en.wikipedia.org/wiki/Naming_law https://en.wikipedia.org/wiki/Naming_law Furthermore there is a standardized subset of Unicode codepoints which is intended to encompass all the legal names in Europe: https://en.wikipedia.org/wiki/DIN_91379 https://en.wikipedia.org/wiki/DIN_91379 > normative subset of Unicode Latin characters, sequences of base characters and diacritic signs, and special characters for use in names of persons, legal entities, products, addresses etc