Bolt\Provider\TranslationServiceProvider::mergeUtf8Locales PHP Method

    protected function mergeUtf8Locales(array $inputLocales)
    {
        $locales = [];
        foreach ($inputLocales as $locale) {
            $locales[] = $locale . '.UTF-8';
            $locales[] = $locale . '.utf8';
            $locales[] = $locale;
        }
        return $locales;
    }