He is also known for his French translation of the Mahāprajñāpāramitāupadeśa (Chinese: 大智度論, English: Treatise on the Great Perfection of Wisdom), a text attributed to Nāgārjuna. Lamotte felt that the text was most likely composed by an Indian bhikkhu from the Sarvāstivāda tradition, who later became a convert to Mahāyāna Buddhism. Lamotte's translation was published in five volumes but unfortunately remains incomplete, since his death put an end to his efforts.
In addition to the Mahāprajñāpāramitāupadeśa, Lamotte also composed several other important translations from Mahāyāna sūtras, including the Śūraṃgamasamādhisūtra, and the Vimalakīrtisūtra. (Source Accessed Sep 30, 2022)