Even if you uncomment the two lines used to replace with the Latin Modern font the Italic and bold Italic shapes of the NeoHellenic font?
By keeping these two lines commented, the document compiles but the letter "a" in italic is not very pleasant. I am not sure this is related to polyglossia only. If polyglossia can't find a font with the characters for the "script" greek, it produces this message. Thus one has to specify a font for greek (and probably other scripts like arabic), but I can't find in Fontspec doc how to do that (in fact how to link the command \greekfont with an other font lacking the greek or arabic characters) On Thu, 7 May 2020 16:51:02 +0200 Ulrike Fischer <ne...@nililand.de> wrote: > Am Thu, 7 May 2020 14:48:08 +0200 schrieb Pierre Dupond: > > > > But If I want to use the modified font to typeset text in greek with the > > italic shape > > I get the message "Please define \greekfont with \newfontfamily command". > > Your example compiles fine for me on texlive 2019 and 2020. > > Beside this: this error is normally a polyglossia problem and not > related to fontspec or xetex. > > > -- > Ulrike Fischer > http://www.troubleshooting-tex.de/ > -- Pierre Dupond <76nem...@gmx.ch>