localization.php

<?php

/**
 * Depend from csv_to_array and get_in functions
 * @link https://gist.github.com/nicklasos/11251754
 * @link https://gist.github.com/nicklasos/9206376
 */
function t($phrase)
{
    static $dictionary;

    // Silex\Application instance
    global $app;

    if (!$dictionary) {
        $file = csv_to_array(realpath(__DIR__ . "/..") . '/translations.csv');
        $dictionary = [];

        foreach ($file as $t) {
            $dictionary[$t['en']] = $t;
        }
    }

    $translated = get_in($dictionary, [$phrase, $app['language']], $phrase);

    return strlen($translated) ? $translated : $phrase;
}