This corrects my own "Other" fix (9d12e59b6), which could never fire. gospel's cities-internet analysis (87a168195) showed the same shape here: key-cities.json has no row with an empty region (1,646 rows), "Other" (2) and "N/A" (19) are region VALUES, and every section heading printed its raw English data string in every locale. The fallback I translated also put a label into the grouping key.
Now, as in cities-internet: the raw region string stays the grouping key (sections, :key, collapse state), with 'Other' as the data guard; the heading is projected at render by regionLabel.js from the keys the data's strings already are the English values of (dashboard.wagfRegion.*, dashboard.other, wall.na), written out in full so the build ships those areas. The poster wall, whose PosterWall prints its section name as given, groups by that projected heading, as country-posters' wall does. keyCities.posters.otherRegion is no longer used.
Headless (_qa-cycle/exp-shepherd/check-keycities-regions.mjs): every one of the nine region values maps to its catalogue heading in ar, zh, es and ru, and an unknown value passes through as data. key-cities is gated, so nothing in public/ changes.
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