Get all translation files

getAllTranslationsFiles.php

<?php

private function getAllTranslationsFiles($container)
    {
        // Discover translation directories
        $dirs = array();
        $overridePath = $container->getParameter('kernel.root_dir').'/Resources/%s/translations';

        foreach ($container->getParameter('kernel.bundles') as $bundle => $class) {
            $reflection = new \ReflectionClass($class);
            if (false === strpos($reflection->getFilename(), 'src')) {
                continue;
            }
            if (is_dir($dir = dirname($reflection->getFilename()).'/Resources/translations')) {
                $dirs[] = $dir;
            }
            if (is_dir($dir = sprintf($overridePath, $bundle))) {
                $dirs[] = $dir;
            }
        }
        if (is_dir($dir = $container->getParameter('kernel.root_dir').'/Resources/translations')) {
            $dirs[] = $dir;
        }

        if ($dirs) {
            $finder = Finder::create()
                ->files()
                ->filter(function (\SplFileInfo $file) {
                    return 2 === substr_count($file->getBasename(), '.') && preg_match('/\.\w+$/', $file->getBasename());
                })
                ->in($dirs)
            ;

            $translationFiles = array();
            foreach ($finder as $file) {
                // filename is domain.locale.format
                list($domain, $locale, $format) = explode('.', $file->getBasename(), 3);
                $translationFiles[] = array('format' => $format, 'file' => (string) $file, 'locale' => $locale, 'domain' => $domain);
            }

            return $translationFiles;
        }
    }