Gist Sample to enable Twig + TwigTranslation bridge to Silex

silex-php+twig+TwigBrige+translation.php

<?php

require_once __DIR__ . '/../lib/vendor/Silex/silex.phar';

$app = new Silex\Application();

$app['debug'] = true;

// Registering Symfony\Yaml and Symfony\Config
$app['autoloader']->registerNamespace('Symfony', __DIR__.'/../lib/vendor/symfony/src');

// Registerying Extensions
// Twig for rendering
$app->register(new Silex\Provider\TwigServiceProvider(), array(
    'twig.path'       => __DIR__ . '/../lib/views',
    'twig.class_path' => __DIR__ . '/../lib/vendor/Twig/lib',
    'twig.options'    => array('cache' => __DIR__ . '/../lib/twig.cache'),
));

// Translator
$app->register(new Silex\Provider\TranslationServiceProvider(), array(
    'locale_fallback'           => 'en',
    'translation.class_path'    => __DIR__. '/../lib/vendor/symfony/src',
));

// Messages
$app['translator.messages'] = array(
    'en' => __DIR__.'/../lib/locales/en.yml',
    'fr' => __DIR__.'/../lib/locales/fr.yml',    
    'de' => __DIR__.'/../lib/locales/de.yml',    
);

// Enable translator Yaml Loader
$app['translator.loader'] = new Symfony\Component\Translation\Loader\YamlFileLoader();

// Enable Twig translation extension (allows to use tag {% trans %} and filter | trans in templates)
$app['twig']->addExtension(new Symfony\Bridge\Twig\Extension\TranslationExtension($app['translator'])); 

$app->before(function () use ($app) {
    if ($locale = $app['request']->get('locale')) {
        $app['locale'] = $locale;
    }
});

// Testing i18n
$app->get('/{locale}/{message}/{name}', function ($message, $name) use ($app) {
    return $app['translator']->trans($message, array('%name%' => $name));
});

silex-phptwigTwigBrigetranslation.php

<?php

require_once __DIR__ . '/../lib/vendor/Silex/silex.phar';

$app = new Silex\Application();

$app['debug'] = true;

// Registering Symfony\Yaml and Symfony\Config
$app['autoloader']->registerNamespace('Symfony', __DIR__.'/../lib/vendor/symfony/src');

// Registerying Extensions
// Twig for rendering
$app->register(new Silex\Provider\TwigServiceProvider(), array(
    'twig.path'       => __DIR__ . '/../lib/views',
    'twig.class_path' => __DIR__ . '/../lib/vendor/Twig/lib',
    'twig.options'    => array('cache' => __DIR__ . '/../lib/twig.cache'),
));

// Translator
$app->register(new Silex\Provider\TranslationServiceProvider(), array(
    'locale_fallback'           => 'en',
    'translation.class_path'    => __DIR__. '/../lib/vendor/symfony/src',
));

// Messages
$app['translator.messages'] = array(
    'en' => __DIR__.'/../lib/locales/en.yml',
    'fr' => __DIR__.'/../lib/locales/fr.yml',    
    'de' => __DIR__.'/../lib/locales/de.yml',    
);

// Enable translator Yaml Loader
$app['translator.loader'] = new Symfony\Component\Translation\Loader\YamlFileLoader();

// Enable Twig translation extension (allows to use tag {% trans %} and filter | trans in templates)
$app['twig']->addExtension(new Symfony\Bridge\Twig\Extension\TranslationExtension($app['translator'])); 

$app->before(function () use ($app) {
    if ($locale = $app['request']->get('locale')) {
        $app['locale'] = $locale;
    }
});

// Testing i18n
$app->get('/{locale}/{message}/{name}', function ($message, $name) use ($app) {
    return $app['translator']->trans($message, array('%name%' => $name));
});