Belarus–Ukraine relations
Belarus–Ukraine relations (, "Byelaruska-ŭkrainskiya adnosiny", , "Ukrains'ko-Bilorus'ki vidnosyny", , "Belorussko-ukrainskiye otnosheniya") are foreign relations between Belarus and Ukraine. Both countries were successively ruled by the Polish-Lithuanian Commonwealth, the Second Polish Republic, and ultimately, the Russian Empire. Prior to the 1991 breakup, both countries were part of the Soviet Union as the Belarusian SSR and Ukrainian SSR when they were the founding members of the United Nations in 1945. Being Slavic nations, both Belarus and Ukraine share closely related cultures and are predominantly inhabited by the East Slavic ethnic groups of Belarusians and Ukrainians respectively, along with a few Russians. Today, the two countries share an 891–km border.
Ukraine
According to the constitution, the state language of Ukraine is Ukrainian. Russian is widely spoken, especially in eastern and southern Ukraine. According to the 2001 census, 67.5 percent of the population declared Ukrainian as their native language and 29.6 percent declared Russian. Most native Ukrainian speakers know Russian as a second language. Russian was the "de facto" official language of the Soviet Union but both Russian and Ukrainian were official languages in the Soviet Union and in the schools of the Ukrainian SSR learning Ukrainian was mandatory. Effective in August 2012, a new law on regional languages entitles any local language spoken by at least a 10 percent minority be declared official within that area. Russian was within weeks declared as a regional language in several southern and eastern oblasts (provinces) and cities. Russian can now be used in these cities'/oblasts' administrative office work and documents. On 23 February 2014, following the 2014 Ukrainian revolution, the Ukrainian Parliament voted to repeal the law on regional languages, making Ukrainian the sole state language at all levels; however, the repeal was not signed by acting President Turchynov and current President Poroshenko.