RainLab\Translate\Models\Locale::isAvailable PHP Method

    public static function isAvailable()
    {
        return count(self::listAvailable()) > 1;
    }

 /**
  * Initialize control
  * @return void
  */
 public function initLocale()
 {
     $this->columnName = $this->formField->fieldName;
     $this->defaultLocale = Locale::getDefault();
     $this->parentViewPath = $this->guessViewPathFrom(__TRAIT__, '/partials');
     $this->isAvailable = Locale::isAvailable();
 }