On BMF, it is not a must to have a course written in your language. In fact, if it is possible, you can write the books with many languages in it. However, you must also take into consideration, your audience. On your platform, you must make sure that you focus on those that understand your languages.
Have you done it before? Have you published a book written in different languages before? How was the experience with its sales?
Have you done it before? Have you published a book written in different languages before? How was the experience with its sales?