Fix: repair malformed plural entries in all translations so every language compiles again

[fuis18]

Fix: repair malformed plural entries in all translations so every language compiles again

Summary

es.ts and ja.ts were dropping out of the launcher's language list (only their regional variants like es_UY / ja_KANJI showed up). Root cause: plural messages whose <numerusform> tags had been stored as escaped text (<numerusform>), which makes lrelease abort. The CI builds each .ts to .qm, and make_translation_index.py only lists languages ​​that produced a .qm — so every affected language silently vanished from the published index_v2.json.

This turned out to be systemic, not just es/ja: 25 files had the same corruption.

Changes

1. New maintenance script tools/check_translations.py (no changes to build):

• --check: audits every translations/*.ts — XML validity, escaped-plural blocks, missing (unfinished) and obsolete (vanished) counts, placeholder mismatches (%1, %n), and whether lrelease actually compiles each file (with the error reason when it doesn't).

• --fix: repairs the corrupt blocks: unescapes <numerusform> back to real tags, ensures the plural attribute is set, and wraps plain-text plural translations into <numerusform>.

• Repaired 25 files: az, cs, da, de, en_AU, en_CA, en_GB, fr, ga, hu, id, it, ja, ko, nl, pl, pt_BR, pt_PT, ro, sq, sv, tr, uk, vi, zh, zh_TW.

How I verified it

python3 tools/check_translations.py --fix
python3 tools/check_translations.py --check
xml=FAULT: 0
lrelease: 98/98 compile — previously ~25 failed

I spot-checked the diffs of ja.ts, de.ts, and en_GB.ts (the text-plural wrap case); changes are minimal and surgical (translate-the-flags only).

Effect

After the next translations.yml run, all 98 languages will be present in index_v2.json again — the launcher will show "Español", "日本語", etc. instead of only their variants.

Notes

• The remaining placeholder_bad findings (a few dozen strings that drop to %1/%n) are content-quality, not build-blocking — they need translator review, so they were left for contributors rather than auto-repaired.
• Follows CONTRIBUTING: <source> and message contexts untouched; only structure/<translation> repaired.

[corecommit]

Thanks for fixing those, I didn't knew they were an error from prism's translation files