In next release I will abandon T2x code for vbSEO integration. It will stay commented to give him credit for first integration, but not used anymore. It will be abandoned because: there was bug (didn't work for vbSEO setting where forum id act as directory), it is twisted and hard to maintain.
I already made my own solution. Safe and easy (T2x solution has 90 lines of code - mine has 5

). It is already tested on 2 forums and will be included in next release. My solution is a bit faster (you will not feel it, but server do less things to recognize seo translation links) and changes with .htaccess will be easier (only add new rules - no changes of existing rules like now). So for those who already have mod installed it can be little inconvenience - you will have to change .htaccess again, but this is the last time and for new installation it will be much easier
Also I would like to add possibility to made translations SEO links for forums without vbSEO. Just need a playground. So if someone wants this functionality - give me access to some test forum without vbSEO