Yes, with Qt layer (root.bnl.gov) one can any local fonts and much more because Qt uses UNICODE (as well as Win32)
You can define the default codepage via ROOT $ROOTSYS/etc/system.rootrc resource file.
For example one can find there the line
Unix..Gui.DefaultFont: -adobe-helvetica-medium-r---12------iso8859-1
To get the russian fonts just define there the cyrrilic font - “iso8859-5”
Unix..Gui.DefaultFont: -adobe-helvetica-medium-r---12------iso8859-5
See: cad.ntu-kpi.kiev.ua/multiling/ko … -5map.html )
Hope this helps