Tree of Savior developers finally told us new information about International Server.
Tree of Savior - English Server
Tree of Savior International server test going be after second Korean CBT. Schedules for Korean CBT2 going be published soon. Together with information about International server developers also published few new screenshots -
Tree of Savior - English Server Test Coming Soon!
If you look close at top-left you can see character icon/avatar. You can see same looking head in Ragnarok Online while creating character.
Tree of Savior - English Server Test Coming Soon!
Ragnarok Online
Tree of Savior - English Server Test Coming Soon!
Stats and items translation already done. In that screenshot we can see -
NXP - Nexon Points? I hope it something different and not cash shop points.
Funds - Ordinary money. (Gold in RO)
Durability, Potential, Sockets and Weight - Big chance that this basic things going be focused on cash shop.
When you get new level you can put points in stats. In last CBT they been not balanced and we can expect  new changes for them.
Tree of Savior - English Server Test Coming Soon!
I suggest you to look at bottom on FPS. Only 25 FPS and in previous screenshot it only 22 FPS. Looks like devs computers a bit weak or they still not fixed FPS problem. Also we can see Level 2 EXP Card. I don't know if it give fixed exp amount or bonus exp for some time.
Chinese, English (03/05), Japanese, Korean, Portuguese (03/05) and Spanish (03/05). That means devs finally make they decision to release EU/Global server 2 days ago. Too bad for them and us devs planning to publish ToS themselves (I hope it only for CBT) on Amazon AWS or something else.
Tree of Savior - English Server Test Coming Soon!
Why it bad?
Most game publishers/developers have they own servers in a real data centers. Also Amazon AWS cost a lot. I don't think devs ready for it.

If you still want to play in global test ToS server be sure to have Facebook or Google+ accounts since you going need them to register in Tree of Savior.