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.. _topics-translation:
===========
Translation
===========
The translation of the user interface is provided module-wise.
Translations are stored in the ``locale/`` directory of a module, each language
in a `PO-file <https://en.wikipedia.org/wiki/Gettext#Translating>`_.
The official language files are named after the `POSIX locale
<https://en.wikipedia.org/wiki/Locale_(computer_software)#POSIX_platforms>`_
standard, e.g. de.po, es.po, es_AR.po, es_EC.po...
The names of custom language files must match the code of the language in the
:class:`~trytond.model.Model` ``ir.lang``.
If a language is set ``translatable``, the translations is loaded into the
database on each update.
Tryton supports derivative translations. This means that if the translation of
a term is missing in one language, it will search on the parent languages.
Also when activate a children language, you must also activate all parents.
Translation Wizards
===================
Set Translations
----------------
The wizard adds new translations to the base language ``en``.
Clean Translations
------------------
The wizard deletes obsolete translations from the database.
Synchronize Translations
------------------------
The wizard updates the translations of the selected language based on the
translations of the base language ``en``. It will also remove duplicate
translations with its direct parent.
Export Translations
-------------------
The wizard requires to select a language and a module and will export the
translations for this selection into a PO-file.
Override translations
=====================
Translations of a module can be overridden by another module.
This can be done by putting a PO file into the :file:`locale/override`
directory of the module that shall contain the translations to override.
To override the translation of another module the ``msgctxt`` string must have
the following content: ``type:name:module.xml_id``
type
The field type of ir.translation.
name
The field name of ir.translation.
module
The field module ir.translation.
xml_id
The XML id that is stored in ``ir.model.data`` as ``fs_id``.
It is optional and can be omitted if it is None.