RainLab\Translate\Models\Message::importMessages PHP Method

    public static function importMessages($messages, $locale = null)
    {
        self::importMessageCodes(array_combine($messages, $messages), $locale);
    }

 public function testImportMessages()
 {
     Message::importMessages(['Hello World!', 'Hello Piñata!']);
     $this->assertNotNull(Message::whereCode('hello.world')->first());
     $this->assertNotNull(Message::whereCode('hello.piñata')->first());
     Message::truncate();
 }