My site is using 2 languages. The comments didn't show well after the update to JomSocial 3. Contacting the developer using Chat was easy, fast and very helpful. Excellent support! He solved the problem in no time.
Pro's: stable, fast, easy to install and configure even for a beginner, great support, great modules to support your forum.
If you need help, just ask the large community, moderators and devvs!