There are 2 possibilities.
1. The new update corrupts your save if it goes from one region to another my save got corrupted recently when I tried transferring my USA save to my JAP game, so maybe it's true.
2. She used Luma's built in region/language changer, as it is better to use.
To use (quoted from Github):
Also, please answer these questions, What language is your game normally in? What language are you trying to change it to? Do the other cheats work? Text2item was only tested on a USA, English EUR, and JAP copy of the game, so if it's another language there is probably a different offset used for the text bubble (meaning it can't find the item that you type in)