Plural in pt and pt-BR should be:
- 1 = single,
- everything else = plural.
In particular, 0 should be plural. There have been various requests to fix it for pt and pt-BR in the past.
- https://translatewiki.net/wiki/Support/Archive/2009/8#PLURAL_in_portuguese_(pt) translatewiki.net
- https://phabricator.wikimedia.org/T25707 Phabricator T25707
- https://phabricator.wikimedia.org/T27507 Phabricator T27507
- https://phabricator.wikimedia.org/T31299 Phabricator T31299
Despite the above fixes, the problem exists again.