The easy decision is based on memory management. Find which languages requires that you do least and use that one. It’s a bastard and every optimisation it offers is lost in weeks of debugging.
I wonder if you’re thinking more of what will make you most employable in future, rather than what would give you the best project. I thought that with my MSc project, I figured the job ads all wanted C++ and I should use that. Instead of making sure that I developed some excellent development skills, as I thought it would, I just ended up not finishing the project and never gaining the qualification. An expensive mistake.
The aim of your final project is to make a show of the skills you have learned during your course. As a team project you need everyone’s skills to be pretty good.
OT but interesting thought- if you have an art or design department see if you can steal anyone from there to help out with the look of your project, you could probably wangle it for them to get accreditation for it also…