Hello,
I had written a long document (~100 pages) in LO-writer with multiple languages - many of them using CTL (Complex text layout) like Hindi etc. When I upgraded my libreoffice to version 5.4, many of the characters (mostly Hindi letters) became a box-block. I checked the forums and I was pointed to change my language settings.
But, to my surprise the CTL (Complex text layout) settings button is frozen on my system. I am using it on MacOSX.
What should I do?