When sharing Game Pak data among countries, developers must use the same game code for all countries. Developers must not use Japanese characters or codes.Reason
This is needed to ensure Controller Pak compatibility among countries.Reference
Refer to "Nintendo 64 Developer News 1.3" "(4) Multi-National Compatibility of Controller Pak Data".Remarks
English version of the libnos.a library for overseas use does not include Japanese font and displays Japanese characters as "-".