Governments usually have their own standards and rules on which names they would recognize and how they would store them. They would reject names that are impos

Governments usually have their own standards and rules on which names they would recognize and how they would store them. They would reject names that are impossibly long or can only be spelled with homegrown writing systems, same as they would reject stuff like "Fuuk Yu". Edit: on the downside, they would probably also reject many reasonable names.