[Translators-l] Plural rule changes for many languages - MediaWiki migrates to CLDR 26

[Niklas Laxström]

MediaWiki is upgrading its plural rules to match CLDR version 26. The
updates include incompatible changes for plural forms in Russian,
Prussian, Tagalog, Manx and several languages that fall back to
Russian. In addition there are minor changes for other languages.

In January 2014, CLDR 24 had introduced several changes in the plural
forms for some of these languages, including Russian, and we had
updated MediaWiki's plural rules to comply with the CLDR standard.
Some of these changes are now being reverted. Below is a detailed
explanation of the changes.

For the migration period, from Monday, 27th October 2014 to Thursday
6th November 2014, we have disabled LocalisationUpdate at Wikimedia
wikis to reduce the chance of ungrammatical translations being
displayed in the interface. Translators are requested to start
updating translations from Tuesday 28th October 2014 onward.

Further updates will be posted on
https://translatewiki.net/wiki/Thread:Support/Plural_rule_changes_for_many_languages

== Russian and language using Russian as fallback ==
Languages affected: Russian (ru), Abkhaz (ab), Avaric (av), Bashkir
(ba), Buryat (bxr), Chechen (ce), Crimean Tatar (crh-cyrl), Chuvash
(cv), Inguish (inh), Komi-Permyak (koi), Karachay-Balkar (krc), Komi
(kv), Lak (lbe), Lezghian (lez), Eastern Mari (mhr), Western Mari
(mrj), Yakut (sah), Tatar (tt), Tatar-Cyrillic (tt-cyrl), Tuvinian
(tyv), Udmurt (udm), Kalmyk (xal).

CLDR 24 plural forms for Russian were:
* Form 1: @integer 1, 21, 31, 41, 51, 61, 71, 81, 101, 1001, …
* Form 2: @integer 0, 5~19, 100, 1000, 10000, 100000, 1000000, …
* Form 3: @integer 2~4, 22~24, 32~34, 42~44, 52~54, 62, 102, 1002, …
@decimal 0.0~1.5, 10.0, 100.0, 1000.0, 10000.0, 100000.0, 1000000.0, …

This has been changed to :
* Form 1: @integer 1, 21, 31, 41, 51, 61, 71, 81, 101, 1001, …
* Form 2: @integer 2~4, 22~24, 32~34, 42~44, 52~54, 62, 102, 1002, …
* Form 3: @integer 0, 5~19, 100, 1000, 10000, 100000, 1000000, …
* Form 4: @decimal 0.0~1.5, 10.0, 100.0, 1000.0, 10000.0, 100000.0, 1000000.0, …

Plurals in translations for affected languages have been updated
automatically where possible. Translators are requested to check all
messages containing plurals, starting from those which have been
marked as outdated.

== Prussian ==
Prussian (prg) now follows the same rules as Latvian (lv):
* Form 1: @integer 0, 10~20, 30, 40, 50, 60, 100, 1000, 10000, 100000,
1000000, … @decimal 0.0, 10.0, 11.0, 12.0, 13.0, 14.0, 15.0, 16.0,
100.0, 1000.0, 10000.0, 100000.0, 1000000.0, …
* Form 2: @integer 1, 21, 31, 41, 51, 61, 71, 81, 101, 1001, …
@decimal 0.1, 1.0, 1.1, 2.1, 3.1, 4.1, 5.1, 6.1, 7.1, 10.1, 100.1,
1000.1, …
* Form 3: @integer 2~9, 22~29, 102, 1002, … @decimal 0.2~0.9, 1.2~1.9,
10.2, 100.2, 1000.2, …

Translators are requested to update all translations containing plural
rules. Those translations have been marked as outdated.

== Tagalog ==
Tagalog (tl) has new rules as follows:
* Form 1: @integer 0~3, 5, 7, 8, 10~13, 15, 17, 18, 20, 21, 100, 1000,
10000, 100000, 1000000, … @decimal 0.0~0.3, 0.5, 0.7, 0.8, 1.0~1.3,
1.5, 1.7, 1.8, 2.0, 2.1, 10.0, 100.0, 1000.0, 10000.0, 100000.0,
1000000.0, …
* Form 2: @integer 4, 6, 9, 14, 16, 19, 24, 26, 104, 1004, … @decimal
0.4, 0.6, 0.9, 1.4, 1.6, 1.9, 2.4, 2.6, 10.4, 100.4, 1000.4, …

Translators are requested to update all translations containing plural
rules. Those translations have been marked as outdated.

== Manx ==
Manx (gv) has a new (fourth) form for decimals. New rules are as follows:
* Form 1: @integer 1, 11, 21, 31, 41, 51, 61, 71, 101, 1001, …
* Form 2: @integer 2, 12, 22, 32, 42, 52, 62, 72, 102, 1002, …
* Form 3: @integer 0, 20, 40, 60, 80, 100, 120, 140, 1000, 10000,
100000, 1000000, …
* Form 4: @decimal 0.0~1.5, 10.0, 100.0, 1000.0, 10000.0, 100000.0, 1000000.0, …
* Form 5: @integer 3~10, 13~19, 23, 103, 1003, …

Translators are requested to update all translations containing plural
rules. Those translations have been marked as outdated.

== Other languages ==
* In Mirandese (mwl), Portuguese (pt) and Brazilian Portuguese
(pt-br), the first form now also includes zero.
* In Uyghur (ug), Lower Sorbian (dsb) and Upper Sorbian (hsb), support
for decimals was added.
* In Asturian (ast) and Western Frisian (fy), the first form is no
longer used for decimals.

Translators are encouraged to review translations with plural forms
and update them where necessary. Because the changes have been minor,
we have not marked those translations as outdated.

  -Niklas