@shihaohong @HansMuller a few changes I wasn't sure about.

• The kn locale changes look off
• The nb locale are new files, do we want these?

@rami-a

Regarding the _nb files:

The _nb.arb files are unexpected due to #53880. The tldr; here is that we use _no.arb files to generate localizations for both nb and no locales now to accommodate having no for "Google-canonical" support and nb for platforms like Android that do not recognize no. I'll probably need to look into how the script that pulls down new arb files from Google, it seems like something might've changed in the translation console or there's been a bug in the script.

Edit: For now, could you manually remove the addition of the _nb.arb files before running gen_localizations.dart, and then message me a pointer to how you pulled down the arb files from Google? Thanks!
Edit2: Weird, I just tried to run the script myself and it doesn't seem to generate _nb.arb files at all. I only get modifications to the existing _no.arb files.
Edit3: I tried again the next day and the _nb.arb were generated, although for some reason it only contained more recent messages (note that https://github.com/flutter/flutter/pull/62896/files#diff-8e7e307b338fde96622bfa9a1a5d7261 only contains the latest date picker translations and not the older messages)

Regarding the _kn changes:

The characters should be escaped due to the crash it causes for some emacs users. Once you run https://github.com/flutter/flutter/blob/master/dev/tools/localization/bin/gen_localizations.dart to update the dart translation source code, it should automatically escape the characters for you in both the generated dart translation source code, as well as the arb files.

Closing PR since #63026 has already been merged