Ya ofcourse! Music can be enjoyed without understanding lyrics. It is famous saying that music is enjoyed without understanding lyrics when one is happy, and the one understand the lyrics when he is sad... i listen spanish ,pashto etc songs i don't understand their lyrics but i enjoy their music!!!

Music is a pleasant sound that gives joy to the mind. The rest is simply noise to us. Music doesn't necessarily require lyrics to make it enjoyable. For example people listen to Brian Silas' music. He just plays music from various Hindi movies and they have no lyrics but people still enjoy his music.

I hope I helped :)