I’m currently learning UE4. And in process, I’ve run accross the issue that the editor does not support Thai text properly. It basically displays 'Tofu’s in the field.
After I’ve played around a little bit, I found that the renderer does support rendering Thai text in the field, but there is no Thai font ships with the engine. I can’t find a way to add fonts to the editor, I ended up replacing DroidSansFallback.ttf with font likes DroidSansThai.ttf (which would breaks other non-latin languages). The editor then displays Thai text properly.
Since this is relatively easy to fix/add (I believe), I’d like to request to add Thai font to the editor. I think DroidSans Thai (from Google) might be a good fit, as other Droid fonts are already in-use in the engine.