On top of having the custom register added to the interface (register's LClass defined for a specific module in Startup).. interface languages matter as well.
Make sure to add the custom register also under:
SetLangMode(LangEnglish,"ENG",0);
So the mystandard have gotten a face lift.
So when the backup is triggered, thats the time when a "snapshot" is taken from the system and written down to the backup (.TXT file)...