Allow setLanguage over API

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36808 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Changes according to new version


git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@36809 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e