I wanted to add to this issue that Geogebra is no longer updated in Debian due to the license, cf. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=692728. The problem is not only the documentation is licensed for non-commercial, but also the language files. As a result, it seems impossible to me to have a package with the free parts only, because such a version would not include any strings and hence be unusable?