Ukraine
Belarus, Kazakhstan, Kyrgyzstan, Tajikistan
1.2 Total No. Of Countries
Bosnia and Herzegovina, Croatia, Czech Republic, Hungary, Moldova, Poland, Romania, Russia, Serbia
Armenia, Azerbaijan, Bulgaria, Estonia, Finland, Georgia, Germany, Greece, Israel, Jordan, Latvia, Lithuania, Mongolia, Poland, Serbia, Tajikistan, Turkey, Turkmenistan, Ukraine, Uzbekistan
National Academy of Sciences of Ukraine: Institute for the Ukrainian Language
Russian Academy, Russian Language Institute of the Russian Academy of Sciences