In Japan, we usually use Japanese-named font in Japanese MS-Windows.
Under the sjis encoding mode, we can use the font in wgnuplot,
but not under the utf8 encoding mode:
set term win
set encoding utf8
set title "(some Japanese title)" font "(some Japanese named font)"
plot x
pause -1
In our environment (Japanese Win 7), attached patch for src/win/wgdiplus.cpp
solved the problem.
Thanks for spotting this. Indeed, the current encoding should be always applied to font names. Fixed in CVS for 5.0 and 5.1.
Please note that this currently only solves your issue for the GDI+ variant of the terminal.