Armenian functions as the only state language and an official language in the Republic of Artsakh, and is the native language of over 99% of the population. Under Soviet rule, the ethnic Armenian population of Nagorno-Karabkah became more proficient in Russian than both Azerbaijanis in the region, and Armenians in the Armenian SSR. Few Armenians learnt Azerbaijani, and the language was actively removed following the Nagorno-Karabakh War. While Russian remained in some use after this time, and was valued as a second language, it was not widely spoken at a native level.