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How to add a translation file to a custom theme?

I did

my_theme.info.yml

'interface translation project': my_theme
'interface translation server pattern': themes/my_theme/translations/my_theme-%language.po

twig template:

 {% trans %}
  status
{% endtrans %}

{{ 'status'|t }}

/my_theme/translations/my_theme-fr.po:

msgid "status"
msgstr "statut"

msgid "statut"
msgstr "status"

followed by a 

drush cr

The output is not translated when I am on the fr page (the default language being english).

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3 Answers 3

Reset to default
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The .po file is not imported by being placed in the themes directory, you need to import it. To do that go here:

Home > Administration > Configuration > Region and Language > Import

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2
  • in /admin/config/regional/translate/import it says : "Les fichiers de traduction sont automatiquement téléchargés et importés quand des langues sont ajoutées, ou quand des modules ou thèmes sont activés.". This does not work when i activate the theme
    – Matoeil
    Oct 11, 2018 at 15:20
  • @Jdrupal, turns out you can import the PO from your theme or module, I didn't know either when I replied initially. api.drupal.org/api/drupal/…
    – Cesar Moore
    Oct 11, 2018 at 17:55
1

Your implementation seems to follow the guidelines on the locale API documentation, but nevertheless, it wasn't working for me either.

What worked for me was implementing hook_locale_translation_projects_alter on a module:

function mymodule_locale_translation_projects_alter(&$projects) {
  $projects['my_theme'] = array(
    'info' => array(
      'interface translation server pattern' => 'themes/custom/my_theme/translations/my_theme-%language.po',
    ),
  );
}

I tested by enabling the module first, then enabling adding the language via drush command:

drush language-add fr

This is my PO file, Drupal seems to require a heading section:

# French translation of Drush Site-Install
#
msgid ""
msgstr ""
"Project-Id-Version: PROJECT VERSION\n"
"POT-Creation-Date: 2018-10-11 16:30+0000\n"
"PO-Revision-Date: 2018-10-11 16:30+0000\n"
"Last-Translator: NAME <EMAIL@ADDRESS>\n"
"Language-Team: LANGUAGE <EMAIL@ADDRESS>\n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=utf-8\n"
"Content-Transfer-Encoding: 8bit\n"
"Plural-Forms: nplurals=2; plural=(n > 1);\n"

msgid "status"
msgstr "statut"

msgid "statut"
msgstr "status"

Without the header, it was skipping the first translation and I was getting this error:

An AJAX HTTP error occurred.
HTTP Result Code: 200
Debugging information follows.
Path: /batch?id=14&op=do_nojs&op=do
StatusText: OK
ResponseText: Notice: Undefined offset: 1 in Drupal\Component\Gettext\PoHeader->parseHeader() (line 257 of /app/core/lib/Drupal/Component/Gettext/PoHeader.php). => Array ...
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5
  • 1
    in /admin/config/regional/translate/import it says : "Les fichiers de traduction sont automatiquement téléchargés et importés quand des langues sont ajoutées, ou quand des modules ou thèmes sont activés.". This does not work when i activate the theme
    – Matoeil
    Oct 11, 2018 at 15:20
  • i have managed to set the automatic import of custom module po files on activation but not theme. are you sure it has to be manual?
    – Matoeil
    Oct 11, 2018 at 15:38
  • 1
    I was looking a bit more into this, I think I am wrong and you can actually attach your translations to a module or theme, let me just update my answer. See api.drupal.org/api/drupal/…
    – Cesar Moore
    Oct 11, 2018 at 15:43
  • thanks but my info.yml properties above does not work
    – Matoeil
    Oct 11, 2018 at 15:55
  • also manually import of previsouly imported and modified po files do not override the previous translation !?
    – Matoeil
    Oct 11, 2018 at 15:57
0

Thanks to what @Cesar Moore said and executing drush locale:check then drush locale:update and drush cr, my translation file is now working for my custom theme too :)

FYI : my PO file is in a custom module folder.

More refs :

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