On 31 August 1989, the Supreme Soviet of the Moldavian SSR adopted Moldovan as the official language with Russian retained only for secondary purposes, returned Moldovan to the Latin alphabet, and declared a shared Moldovan-Romanian linguistic identity. As plans for major cultural changes in Moldova were made public, tensions rose further. Ethnic minorities felt threatened by the prospects of removing Russian as the official language, which served as the medium of interethnic communication, and by the possible future reunification of Moldova and Romania, as well as the ethnocentric rhetoric of the Popular Front. The Yedinstvo (Unity) Movement, established by the Slavic population of Moldova, pressed for equal status to be given to both Russian and Moldovan. Transnistria's ethnic and linguistic composition differed significantly from most of the rest of Moldova. The share of ethnic Russians and Ukrainians was especially high and an overall majority of the population, some of them Moldovans, spoke Russian as a mother tongue.