> A translated book can be better than the original. Can you give some examples? > But you often need mastery of the language you translate to. Professional

> A translated book can be better than the original. Can you give some examples? > But you often need mastery of the language you translate to. Professional written translation is virtually always done into your native language, not into a language you've learned later. So that mastery should be taken for granted; it's a prerequisite.