No matter how you look at it, this world's magic language is Japanese (Associated Names)

One day due to an accident, Okata Kazuhiko, a university student living in Japan, drew closed the curtains on his short life. In the world he reincarnated as Gerald, he discovered that, for whatever reason, the language of magic was Japanese. Gerald, who had retained his memory, quickly grasped any spells due to his mastery…