i18n: review and fix the strings added since the last translation review

Reviews the 474 strings that 27 pull requests added since the last
review, in all twelve catalogs, and fixes what the review confirmed:
wrong agreement when a placeholder takes a neutral value, plural-less
counts that read "1 sightings", terms that differ from the glossaries,
and typography the language guides set. Also applies most of the
findings earlier reviews left open.

zh-Hant is converted from zh-CN again. The new strings had been
translated separately with Taiwan vocabulary. The zh-Hant guide lists
two more characters OpenCC picks wrongly.

Three tests expected the old German and Spanish wording.

docs/translations/zh-Hant.md

@@ -4,7 +4,7 @@ Catalog: `src/i18n/locales/zh-Hant.json`. General rules: [TRANSLATORS.md](../TRA
 
 `zh-Hant` is the Simplified Chinese catalog (`zh-CN`, credited to abiyeenzo, #914, and EDIT-Aeterna, #979) written in Traditional characters with OpenCC character conversion. Wording and terminology are the same as in `zh-CN`: change a term in [zh-CN.md](./zh-CN.md) and the `zh-CN` catalog first, then convert. Only the script differs.
 
-After `s2tw` conversion, fix the characters OpenCC picks wrongly: 年曆史 → 年歷史, 下遊 → 下游, 並道 → 併道, 發佈 → 發布, 公佈 → 公布.
+After `s2tw` conversion, fix the characters OpenCC picks wrongly: 年曆史 → 年歷史, 下遊 → 下游, 並道 → 併道, 發佈 → 發布, 公佈 → 公布, 控制檯 → 控制台, and 周 → 週 where it means a week (1 週/秒).
 
 ## Style