#30439: Translations issues on Django upgrade due to unexpected changes in
plural
forms
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Reporter: Michal Čihař | Owner: Rodrigo
Type: Bug | Status: assigned
Component: Internationalization | Version: 2.2
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by Michal Čihař):
Replying to [comment:16 Rodrigo]:
> Then functions like
[https://github.com/django/django/blob/master/django/core/management/commands/makemessages.py#L633
copy_plural_forms] should get it from there, and when syncin', either
overwrite it or generate an empty one and do a msgmerge.
Overwriting plural form will mess up existing translations.
> If you generate and compile the messages using the django-admin
commands, there would be no problem, I think the case you are referring is
when you put "pos and mos" from external sources - like a translation
platform, which for convenience may use less plurals than the
corresponding or specified for the languange - in locale dirs which have a
different plural forms than the one coming with Django, which is not
supported.
The current mess was started by Transifex, which is AFAIK Django official
localization platform. I don't think they support honoring plural forms
existing in the file, they always rewrite to whatever they have hardcoded.
> Then the ticket would be "Add support for variable number of plural
forms in Django in order to support different translations platforms
outputs", do you agree?
True, I didn't notice this is covered in the docs. However, in such case
Django should not unadvertised change plural forms in existing
translations.
>
> I still don't understand why Django has the wrong approach, because a
language should have only one number of plurals and one plural equation.
Once it is right, if you provide less than specified, then it's
incomplete.
I noticed it on Czech where Django has wrong plural form (see above, it
can never evaluate to 2, so even if it defines 4 plurals, one of them is
never used). Still, there might be valid reason to have different plural
forms and equations in different scope.
I do have quite some insight into this because I develop
[https://weblate.org/ Weblate] (using Django), where we put quite some
effort to handle plural forms correctly :-).
The earlier mentioned example of
[https://hosted.weblate.org/languages/he/#information Hebrew] can be seen
on our public hosting service - 25% of translations use simple two plurals
and 75% use more complex four plurals. Both are correct and in many cases
the one with two plural forms is working well at it makes it easier for
translators.
Another example where things would be messed up with current Django
implementation is Lithuanian, see
https://github.com/WeblateOrg/weblate/issues/901 for discussion we had on
this at Weblate.
--
Ticket URL: <https://code.djangoproject.com/ticket/30439#comment:22>
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