Thai language support
 

It is time for me to switch to another distro, after 14 years of my previous choice. I want to try Mint. But, I need Thai language support. No, I don't want the user interface to be in Thai, but I want to be able to save files with names in Thai characters, and to be able to read those names in a file manager.

I see that the choice of desktop environment lies between MATE, Cinnamon, KDE and Xfce. My favorite would be Xfce, but I already know it does not have Thai language support. KDE does, I am sure, but I don't like KDE much. Simple,lightweight,low resource usage and minimal eye-candy are the qualities I seek. That's not KDE. So it looks like MATE or Cinnamon. Does either of those desktops offer Thai language support? Can anyone using the Thai language confirm that support? Advice appreciated greatly. Thank you.

Those are Gnome clones.
Of the three, the obvious choice is KDE. My wife uses it on Slackware current with Chinese language support (big 5), she's had no complaints (about that, at least)