jayvdb created this task.
jayvdb added subscribers: jayvdb, Xqt.
jayvdb added projects: pywikibot-core, Pywikibot-i18n, 
MediaWiki-extensions-Translate.
Herald added subscribers: pywikibot-bugs-list, Aklapper.

TASK DESCRIPTION
  plural.py in #pywikibot-compat was derived by @xqt from `plural-gettext.txt` 
in commit a3078ff34a ; and was copied to #pywikibot-core in bfb857199 (minor 
fix minutes later 5664c76) , with no substantive changes since August 2011.
  
  one source of this is #mediawiki-extensions-Translate  
https://github.com/wikimedia/mediawiki-extensions-Translate/blob/master/data/plural-gettext.txt
 
  
  That was last updated in August 2011 from 
http://translate.sourceforge.net/wiki/l10n/pluralforms (rETRA56bf77b78d)
  That project is now at 
http://localization-guide.readthedocs.org/en/latest/l10n/pluralforms.html and 
is now hosted at 
https://github.com/translate/l10n-guide/blob/master/docs/l10n/pluralforms.rst 
and the raw data is in 
https://github.com/translate/translate/blob/master/translate/lang/data.py#L25 . 
 The history shows many plural fixes since 2011.
  
  The 'proper' source now is CLDR
  
  http://cldr.unicode.org/index/cldr-spec/plural-rules
  http://unicode.org/repos/cldr/trunk/common/supplemental/pluralRanges.xml
  http://unicode.org/repos/cldr/trunk/common/supplemental/plurals.xml
  
  With regards to #mediawiki-extensions-Translate , it is only `GettextFFS` 
which uses the `plural-gettext.txt` data file - MediaWiki itself now uses 
`languages/data/plurals.xml` and `languages/data/plurals-mediawiki.xml` which 
are CLDR based, and I guess the majority of the Translate extension uses this 
also.  (`scripts/plural-comparison.php` also uses the `plural-gettext.txt` data 
file, but only to compare the various plural data )
  
  However I expect that `plural-gettext.txt` distributed by 
#mediawiki-extensions-Translate should be updated.
  
  For #pywikibot-core, a dev dependency on 
https://pypi.python.org/pypi/translate-toolkit would allow a maintenance script 
to load the plural data from the `translate` project, and generate `plural.py`.
  ```
  >>> from translate.lang import data
  >>> data.languages['gu']
  ('Gujarati', 2, '(n != 1)')
  ```

TASK DETAIL
  https://phabricator.wikimedia.org/T114978

EMAIL PREFERENCES
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To: jayvdb
Cc: Aklapper, pywikibot-bugs-list, Xqt, jayvdb, KartikMistry



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