i installed the game and the letters are all blocks. Cant read anything. Can somebody help me with this

If you not solved it yet - reinstall it (or verify for Galaxy version).

This is conflict from previous game version been installed on same PC. Language setting from previous version. Reinstalling\verify do reset it, while installation only update set.

Also, game exe (or galaxy exe if use Galaxy) should be set runasadmin to get access to WinRegistry.
(and never install games to Program Files)

If you use non-english version (GOG version is MULTI partially text translated to few more languages not all of them listed on store page) and\or install additional language from 3rd party source - it should be properly set in WinRegistry.