The transfer will happen sometime this month and it will involve both European and North American accounts. The creators will be merging these populations due to popular demand: "One of these [suggestions] was the desire to join the European servers: New Frontier and Goblin Republic. So we thought, why not use this great opportunity to finally unite all of our European and North American players on the same server? There are no more technical issues or other obstacles in our way, so right after we merge Webzen EU and US communities on March 18th, we will organize a migration of our players from Italy and Turkey to the same servers (it will happen two weeks later)."
Allods Online will be synchronizing client versions across the board (except in Russia, which will remain ahead of the pack) due to this change and will not be supporting Polish localization going forward. The game will transfer regional accounts separately to avoid any conflicts.