code: public static function translate($key, array $args = array())
      {
          if (self::$isInit === false) {
              throw new BadUse('locale doesn\'t seem to have been initialized');
          }
          $oldKey = $key;
          $section = self::$translations;
          while (isset($section[$key]) === false && ($pos = strpos($key, '.')) !== false) {
              if (! is_int($pos)) { // re: https://github.com/phpstan/phpstan/issues/647
                  break;
              }
              $subSection = substr($key, 0, $pos);
              if (isset($section[$subSection]) === false) {
                  break;
              }
              $section = $section[$subSection];
              $key = substr($key, $pos + 1);
          }
          if (isset($section[$key]) === false) {
              Logger::get()->error('can\'t find translation for key "' . $oldKey . '"');
  
              return '(null)';
          }
  
          return $section[$key];
      }
docs: Get a translation from loaded files.
  
  @static
  @throws BadUse if locale isn't initialized