"İyi ki varsın Melisa, doğum günün kutlu olsun!" (It's good that you're in my life Melisa, may your birthday be celebrated!)
The phrase you provided is in Turkish and translates to Iyi Ki Dogdun Melisa Isme Ozel
If you are looking for the correct way to write this as a birthday greeting for Melisa, here is the "proper" version in Turkish: Breakdown: "İyi ki varsın Melisa, doğum günün kutlu olsun
This is the standard Turkish way to say "Happy Birthday." It literally means "It is good that you were born." Melisa: The person's name. "İyi ki varsın Melisa