Thanks for the info. I just want to confirm if I do the region change will the menu language on JAP 3ds change in english?Yes, 9.0 to 9.2 are basically almost identical.
While you don't want A9LH, it is still recommend to use the A9LH guide for a menuhax+redNAND//emuNAND setup.
Link: https://github.com/Plailect/Guide/wiki
Just do Part 1 to setup Menuhax, skip Part 2 as it doesn't apply to you, and do Part 3, and for Part 4, stop at Section I, Step 25-26. This is so you have FBI injected into redNAND//emuNAND, and have made NAND backups.