Yii2 Translation Does Not Work

Yii2 translation does not work

You Just Follow This Steps......

Step 1: In the common directory , create messages folder.

Step 2: Create i18n.php file inside common/config directory with following content:

<?php
return [
    'sourcePath' => __DIR__. '..' . DIRECTORY_SEPARATOR . '..' . DIRECTORY_SEPARATOR . '..' .    DIRECTORY_SEPARATOR,
    'languages' => ['en-EN', 'ru-RU'], //Add languages to the array for the language files to be generated, here are English and Russian.
    'translator' => 'Yii::t',
    'sort' => false,
    'removeUnused' => false,
    'only' => ['*.php'],
    'except' => [
        '.svn',
        '.git',
        '.gitignore',
        '.gitkeep',
        '.hgignore',
        '.hgkeep',
        '/messages',
        '/vendor',
    ],
    'format' => 'php',
    'messagePath' => __DIR__ . DIRECTORY_SEPARATOR . '..' . DIRECTORY_SEPARATOR .      'messages', //path of messages folder created above
    'overwrite' => true,
];

Note: Make sure to add all required languages to 'languages' array. In the above example I have added English and Russian for Generate Yii2 Framework multi language.

Step 3: Add the i18n component in config file common/main.php configuration as follows:

'components' => [
    ...
    'i18n' => [
        'translations' => [
            'frontend*' => [
                'class' => 'yii\i18n\PhpMessageSource',
                'basePath' => '@common/messages',
            ],
            'backend*' => [
                'class' => 'yii\i18n\PhpMessageSource',
                'basePath' => '@common/messages',
            ],
        ],
    ],
    ...
],

Step 4:

Add the language module in common config file to use the default language on your app, such as:

'language' => 'en-EN' inside common/main.php.

You now can use Yii::$app->language = ‘en-EN’ at any runtime like URL request, query code.

Note: In any Model, Controller Generate by Gii, you can see Enable I18n ticket choice, just enable this for Multi language. Gii Tool will auto generate a Model has pre-defined as below, due to frontent or backend folder:

Yii::t('frontend', 'Translatable String');

Yii::t('backend', 'Translatable String');

Step 5: Run this command line from Yii2 app folder:

yii message/extract @common/config/i18n.php

This command line will Generate Yii2 Framework multi language translation files inside common/messages and divide into frontend and backend folder.

For example: Yii message will generate the translation files as follows:
common/
 .....
       messages/
            en-EN/
                  backend.php
                  frontend.php
            ru-RU/
                  backend.php
                  frontend.php
 .....

If you want to edit the translate text, just open backend.php or frontend.php file and edit.

Yii2 i18n not working

You can set target language in your config:

...
'language' => 'ru-RU',
...

If 'sourceLanguage' => 'en-US', yii will translate from en-US to ru-RU.

And config i18n component will be:

'i18n' => [
    'translations' => [
        'app' => [
            'class' => 'yii\i18n\PhpMessageSource',
            'basePath' => '@app/translation',
            'fileMap' => [
                 'app' => 'app.php',
            ],
        ],
    ],
 ],

Directory structure is:

- translation
    - ru-RU
        - app.php

Example in file app.php

return [
    'Home' => 'abcxyz',
    'source key' => 'translate to russian',
];

Hope it helpful.

Goodluck and have fun!

Translations in sourceLanguage does not work in Yii2 application

According to samdark at Yii Forum, this is by design. Translations are not performed, if language = sourceLangage.

To workaround this, and force translations in this case, one must set forceTranslation to true.

Therefore, one must add / modify i18n component in components section of application's config in the way similar to this:

'i18n' => [
    'translations' => [
        'app' => [
            'class' => 'yii\i18n\PhpMessageSource',
            'forceTranslation' => true
        ],
    ],
],

Yii2 translation does not work in config/params

Answers:

1. Because config/params.php file will merge with main config before initialization of main application. For translation will used \yii\i18n\I18N component.

2. Yii2::t() is not heavy method. But if you have any problems with performance, you can override this method and execute Yii:$app->getI18n()->translate() only for existing strings, or enable cache this values.

Not working Translations with Environments in Yii2

The problem is in app*, because it's not app* category, this works:

    'i18n' => [
        'translations' => [
            '*' => [
                'class' => 'yii\i18n\PhpMessageSource',
                'fileMap' => [
                    'companie' => 'companie.php',
                ],
            ],
        ],
    ],

Or if you want write 'companie*' =>

If it is still not working, you did set incorrect path to translate files. By default it must be BasePath/messages/LanguageID/CategoryName.php.

If you want to use one file in backend and frontend you should create for example common alias in common config (advanced yii application) and set this alias in i18n config. This is full example:

Common config:

Yii::setAlias('@common', dirname(__DIR__));
return [
    'language' => 'ru',
    'sourceLanguage' => 'ru',
    'components' => [
    'i18n' => [
        'translations' => [
            '*' => [
                'class' => 'yii\i18n\PhpMessageSource',
                'basePath' => '@common/messages',
                'fileMap' => [
                    'companie' => 'companie.php',
                ],
  ....

In traslate file /common/messages/en-US/companie.php

<?php
return [
    'string in russian' => 'string in english'
];

Check translate using this code:

\Yii::$app->language = 'en-US';
echo \Yii::t('companie', 'string in russian');

Yii2 Internationalization translation not working for model validation

Issue solved in
https://github.com/yiisoft/yii2/issues/8173

Needed to override pre-defined categories and an issue with Arabic language

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