If you are not sure yet, that you want to spend some money to buy vBET and improve in great manner your forum - we have great news for you:
You can enjoy free version of vB Enterprise Translator!
Of course it is not so powerful, and many great features are implemented in vBET 3.x/4.x only. Still vBET 2.x translates your forum to 52 languages. So if you feel like have to think a little before you buy vBET 3.x/4.x, just install free vBET 2.x, see how great it is and then come back for vBET 3.x/4.x
Also this forum is a good place to discuss any issues about vBET 2.x
Note that vBET 2.x is free and has it's own free usage license, which is accessible on this pages (where you can also download the mod):
vBET 2.3.x - free version for vBulletin 3.8
vBET 2.4.x - free version for vBulletin 4.0