Ol Is Slavik (tradishɔnal wan bak Ol Rɔshian; Belarusian: старажытнаруская мова; Rɔshian: древнерусский язык; Yukren: давньоруська мова) na bin langwej we dɛn bin de yuz insay di 5th–16th sɛntiwɔd[4][5] (ɔda , frɔm di ia 700 ɔ 800 to di 13 ɔ 14 sɛntiwɔd)[6] bay di Ist Slav dɛn we leta di Belarusian, Rɔshian, Rusin, ɛn Yukren langwej dɛn kɔmɔt.