If you are talking about story and stuff, then no. I am working with material not influenced by any Final Fantasy I know of.
If you are talking about spell names, etc. Then yes. I am. I can't be bothered to come up with some vague spell/skill names that only mean something to people if they look it up in foreign dictionaries. I named them this way to immediately get their point across. People don't have to read a description to understand what a spell does, they simply look at its name and they know. It speeds the learning curve up a good deal.