There are tons of books to choose from and we cannot guarantee which one will sell best. It really depends on factors such as effectiveness of the book cover, quality of the translation, ability for the burb to attract buyers, number and score of the reviews, and how you and the author promote the book. The creating and publishing of the translated book is a team effort. Both the rights holder (author or publisher) and translator can do things to enhance sales -- creating a win-win situation.