Confusing plural examples

[timwhitlock]

There are two examples of plural forms on this page

1. "%d key" : [ "%d key", "%d keys" ],
2. "test singular": ["test plural", "test_1 singular", "test_1 plural"],

These appear to be different structures. Using Gettext terminology they look like:

1. msgid: [ msgstr1, msgstr2 ]
2. msgid: [ msgid_plural, msgstr1, msgstr2 ]

Can you please clarify how this structure should be used and whether it has changed at some point?

[kbrock]

Different languages have different pluralization rules.

English only has 2 forms: singular (used for 1) and plural (used for 0 or more than 1)

Arabic has 6. see http://docs.translatehouse.org/projects/localization-guide/en/latest/l10n/pluralforms.html