Composica 4.0 features extensive multi-lingual support. Courses can be written in any language, including East-Asian and Middle-Eastern languages. Right-to-left authors benefit greatly, as this does not only apply to the writing direction, but also to the entire layout direction (elements may be positioned relatively to the right and flow to the right). It is even possible to take a left-to-right layout and, with a single click, reverse the layout flow to use right-to-left, optionally including flipping of images. 

Additionally, the Composica 4.0 user interface itself is available in multiple languages, including English, Spanish, French, and Chinese.