Support for special characters

Gnuplot has no universal Unicode escaping mechanism, you can only work with encodings. However, not all terminals support all encodings, not all terminals even support utf-8. Some terminals seem to support only one encoding. E.g. WX seems to support only UTF-8, X11 seems to support only Latin-1. Postscript, SVG, PNG seem to support both UTF-8 and Latin-1.

The gnuplot Haskell bindings always write using the system-wide default encoding. Thus it is better not to set an encoding other than locale explicitly. However, if you write the files yourself in a certain encoding you should use the encoding option of the according terminal.