Pamphylian Greek was a language that some people in ancient times spoke in the region of Pamphylia.
When we think of languages, we know that people use different words, and sometimes even different sounds and grammar rules to communicate. It's kind of like how you and your friends might have your own special secret code or language that you use with each other.
In this case, Pamphylian Greek was a language that the people of Pamphylia used to talk to each other. It was sort of like their own special language that they used to communicate with each other.
Unfortunately, we don't really know a lot about Pamphylian Greek because it hasn't been spoken for a very long time and not many texts have survived. But some people who are really interested in ancient languages and history are trying to learn more about it by studying what little information we do have.