Geotag displayed in wrong language

Im currently living in Japan and I switch my iPhone's language back and forth between English in Japanese for language practice. I noticed a few bugs related to that.

First one my iphone permanently geotagged all my pictures in Japanese, even pictures previously geotagged in English and that were took years before I started to switch language. My iPhone is currently in English, if I take a picture now it geotags it in English even Japanese areas with Japanese names, the geotag is in Roman letters. However all my pictures from before 3 days ago are in Japanese letters.

Second, some commands remain in Japanese even before switching back to English (like "slide to open" on app notifications on the home screen when iPhone is locked). I've contacted apple support with no success. Please if you know a way to make the geotag match the current language of my phone (or just leave everything in English) please let me know as I would prefer my pics to be geotagged in English. Thank you.