Well, I already have parentheses parsing working, which is the biggest challenge. The rest should be really easy.
Of course I'm working on Brainfk, both because of how cool it is and how simple for a Turing Complete VM. Also, because I have a lot of practice implementing it (https://www.slideshare.net/AurSaraf/virtual-machines-and-bra...)
https://docs.google.com/spreadsheets/d/1g3-FZBnkDuLqFYOmk457...
Stay tuned.