I had this issue and don’t know if I fixed it or it fixed itself. I also had the tweaker installed. After closing the game I used the reset option in the main launcher, then checked that the tweaker was set to NA but didn’t change the options there but did change resolution and virtual full screen from the sega launcher. I relaunched the game and it was in English. As I said, I don’t know if it fixed itself or the reset did anything.
Converse with fellow players