Nobody is learning Mandarin. Not even the Chinese! LOL
They're all relying on automatic translation and even the Chinese are using speech recognition to enter characters on their phones. The written language is rapidly being forgotten.
...which is the destiny of all pictographic and logographic languages so it shouldn't be seen as a bad thing, necessarily π€·
Kindaβ½ It would dramatically change everything about the show. Rudeus would spend the first ten years playing with herself instead of trying to learn magic π€£