It isn't a log from the newest version, it's a log from old DEV. It will not contain any information that could be needed to fix your problem.
Xiaomi didn't release ROM for Xiaomi 12 until now. As far as we know, they plan to do it in December.
We wish it could be so easy to push fix to stables every week, but sadly it isn't.
Yes, all languages are included in both beta and stable ROMs. "What happens" in your case - I don't know, because you didn't provide info about your phone and current ROM version.
Use MiFlash with "clean all and...
No, by "wipe data" I mean wipe Dalvik + cache + data directory which you can do in TWRP by default. It doesn't clear internal storage, although you will have to configure all apps + settings again just like a factory reset. You can also wipe internal storage, but it isn't being done by default.
If you're using a Beta ROM (newest one coming today, or newer), it will work just fine. If you're using a Stable, then the latest reupload that will come in few days will remove existing fix for Play Integrity (which in fact didn't work since yesterday...), allowing you to flash Magisk and...
Starting from tomorrow:
- beta ROMs will include the fix the same way it used to be until today and it will be updated with each update as beta updates are usually faster than stables,
- stable ROMs will NOT include the fix at all. To make Google Wallet work, you must flash Magisk and the...