Optional ReadonlyfewUsed for small counts (Slavic languages and others).
Optional ReadonlymanyUsed for large counts (Slavic languages and others).
Optional ReadonlyoneUsed for a count of 1.
ReadonlyotherRequired default form.
Optional ReadonlytwoUsed for a count of 2 (Arabic and others).
Optional ReadonlyzeroUsed for a count of 0. Falls back to other when absent.
Plural forms, following CLDR plural categories.