Maybe both machines need to have the font for your language (which one???) installed? Or maybe NX does not support some characters because they are not utf-8 compatible?
In addition: in your NX session setup, please click the Configure tab. Then in the new window, click the Environment tab. On the bottom of that window is a field named: Select NX fonts. Click on the tab default Default. A new window will open and in there at the bottom select the appropriate font (see attached image) under the dropdown menu Script, maybe you need Cyrillic instead of Latin, or something else depending on the language you use.
hope this helps,
[attachment deleted by admin]