Old Ruthenian language may refer to:
*
Old East Slavic
Old East Slavic (traditionally also Old Russian; be, старажытнаруская мова; russian: древнерусский язык; uk, давньоруська мова) was a language used during the 9th–15th centuries by East ...
, a language used in the 10th to 14th centuries by East Slavs in Kyivan Rus', ancestor of Russian and Ruthenian (ancestor of Belarusian, Rusyn, and Ukrainian)
*
Ruthenian language
Ruthenian ( Belarusian: руская мова; Ukrainian: руська мова; Ruthenian: руска(ѧ) мова; also see other names) is an exonymic linguonym for a closely-related group of East Slavic linguistic varieties, particularly th ...
, a language used in the 15th to 18th centuries in the Grand Duchy of Lithuania and the Cossack state, ancestor of Belarusian, Rusyn, and Ukrainian
{{disambiguation