Using MS Windows it is possible to use another language (i.e. their locals or character sets) without the owning the corresponding operating system (i.e. a russian or ukrainian version of MS Windows; see the z-Tree manual v4.1 p. 205). With this instruction there is no need to use a specific MS Windows OS anymore as we may just change the local language of the Linux system.
Refer to this section if you encounter either similar character encoding errors or your local characters just disappear (like with the Polish letter ‘ł’, which just gets to be a regular ‘l’)
However note, that ‘copy and paste’ of text won’t work in most cases. Use your local Windows Host system to develop your z-Tree program and use z-Tree unleashed just for the productive deployment of an experiment.