Translation off accept_all value

None, I’m using two functions:

function translation($pt, $en, $es) {
  $lang = get_site_language();

  if ($lang === 'en') {
    return $en;
  } elseif ($lang === 'es') {
    return $es;
  } else {
    return $pt;
  }
}

function get_site_language() {
  $uri = get_page_uri();

  if (strpos($uri, 'en') === 0) {
    return 'en';
  } elseif (strpos($uri, 'es') === 0) {
    return 'es';
  } else {
    if ($_GET['lang'] == 'en' || $_GET['lang'] == 'es') {
      return $_GET['lang'];
    } elseif (preg_match('/\/[posts|category|tag]\-en/', $_SERVER['REQUEST_URI'])) {
      return 'en';
    } elseif (preg_match('/\/[posts|category|tag]\-es/', $_SERVER['REQUEST_URI'])) {
      return 'es';
    } else {
      return 'pt';
    }
  }
}