Spanish eBook should be similar to English ebook when assigning

I love being able to assign the ebook sections of the lessons we are on, however the Spanish eBook does not have the same capabilities. My ELLs don't like highlighting to translate, they prefer to read the content in Spanish. The Lessons should be available from the Spanish eBook the way they are in the English version. It's very frustrating that I have to assign the entire Spanish Student textbook and then the platform doesn't look anything like the English textbook platform does. The Table of Contents doesn't minimize, so the Spanish textbook can't take up the screen space it needs. Students have to zoom in to read...it definitely needs some enhancements or changes to make it easier to navigate.