Non-regulated: Ukraine, Belarus, Kazakhstan, Uzbekistan, Kyrgyzstan, Azerbaijan.
Regulated: Estonia, Lithuania.
While IQOption don’t accept traffic from Russia and Latvia, you can target the following countries where Russian is widely used as above.
IQ Option in Russian
The Russian language opens up a selection of countries that you can work with, and to help you convert traffic from them, iqoption has translated even more banners into Russian.