Both methods can be used, using a mix of both doesn't matter one way or another.
If the name contains special letters like ü û ï ò ì or such it most usually be done through a TXT_KEY_ xml entry to avoid formatting errors when the code interprets the string.
If the name contains special letters like ü û ï ò ì or such it most usually be done through a TXT_KEY_ xml entry to avoid formatting errors when the code interprets the string.