Fix for Chinese, fixed LaTeX for RTL

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29690 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Typo in language class

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@29691 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e