nursery_aide is what the trainer class is called in English and would be consistent with using the English names for the trainer classes.

Aren't the trainer classes supposed to use the Japanese names?

I saw the forum where it was decided the generic trainer class names would be the English versions.

forum #77786

forum #92562

Note in the second link the alias for occult_maniac_(pokemon) -> hex_maniac_(pokemon) where hex_maniac is what the class is called in English.

I believe the only original Japanese names used are for named characters. General trainer classes and the pokemon themselves are tagged with the English names.