Tocharian A and B are two cognate languages which belong to languages of Buddhism in Central Asia. The Tocharian vocabulary shows strong influence from Sanskrit and Indo-Aryan languages in general at different levels. Several examples of calques are discussed. This case is substantiated by two specific studies: the vocabulary and phraseology of wonder and amazement, which is often met in Buddhist texts, and the designation of the 'prince' in the two Tocharian languages.