It's important to be mindful of the fact that these are distinct languages and cultures, and using the term "Gypsy" can be seen as outdated and offensive.
Here's how you would say "love" in those languages:
* Romany: "ľuv" (pronounced "loo-v")
* Shelta: "gra" (pronounced "grah")
If you're interested in learning more about the languages and cultures of the Roma or Irish Travellers, I recommend doing some research on their websites or consulting with a language expert.