In his extensive commentary on the Persian translation of the Mahabharata (Razm-Nama in Persian) and Nizam al-Din Panipati's rendition of the Yoga Vasistha, he complains about the quality of the translation, which implies that he was familiar with Sanskrit.
He laments about the quality of the Razm-Nama and Nizam al-Din Panipati's Yoga Vasistha translation, suggesting that he had a strong grasp of Sanskrit.