The nplural syntax in .po file metadata can be hard to grok,
even for native speakers. This function tries to de-mystify
this by providing verbal expressions of which numbers apply
to which index in the msgstr array.
Arguments
- language
A single locale code. See
translate_package()for details.- index
Optional. If supplied, a 0-based index to explain for a given language. If not supplied, all plurals for the supplied language are described.