It's noted that the localization files for 1.18.2 are slightly different from those for 1.19.2 due to different mod support list.
So if you are interested in contribute to CCK localization, it's recommanded to open 2 PRs for 2 different lang files in 2 branches.

Active 1.18.2 branch
Active 1.19.2 branch

Please notice: the file need to be translated is in src/main. Please ignore file in src/generated since it's, well, generated.