Isekai no mahou gengo ga doumitemo nihongo dattaken

Isekai no mahou gengo ga doumitemo nihongo dattaken summary:

One day due to an accident, Okata Kazuhiko, a university student living in j.a.pan, 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 j.a.panese.
Gerald, who had retained his memory, quickly grasped any spells due to his mastery of j.a.panese. Taking advantage of his unparalleled skill in j.a.panese, Gerald leaves his village in order to become the greatest magician the world has ever seen.
※ There will be some elements of seriousness to this story, but fundamentally, I am aiming for a heartwarming, mellow, carefree and super-relaxed “battle focused” story.