https://bloomlibrary.org/
Bloom makes it easy to create simple books and translate them into multiple languages. It also has an online crowd-sourced library of books that you can download and translate.
Here's the problem Bloom addresses:
When working in local-language literacy projects, we end up settling for what is practical, instead of what is actually needed. The hope is often that a primer and a handful of books will be enough to open up the joy and power of reading in minority language communities. But realistically, we know that it takes stacks of titles to make reading worthwhile and give the practice needed to develop true literacy. The problem has been who will make all those books? How will we find the time? Where will we get the content? So we settle for the possible and hope for the best.
Build Local Capacity
Bloom dramatically lowers the bar, so that many more people can get involved in building a large collection of local language books. Bloom was designed with new computer users in mind, and it has special features to guide them in simple book making, so people need far less training than alternatives such as Word, Publisher, or In Design.