Since I've disabled the bbpress forum (I only kept it around because standalone bbpress is now a relic), and plan to integrate this forum (phpBB3) with WordPress. It should be an interesting undertaking.
Fora is a generally accepted pluralization for forum. This site was created in 2010 as a virtual discussion board for basic interaction in cyber-space. The platform chosen in phpBB, one of the more popular open-source bulletin boards.
Though the popularity of online forums has diminished considerably due to the growth of social media and usage of smartphone apps, I still maintain it for posterity's sake. Perhaps I've gotten a bit "old-fashioned", but you have to be "older" to even know about "old-fashioned", and that's a good thing!
Feel free to get involved and contact me using any of the contact options on the site should you have any beefs, qualms, quarrels, or questions.