I have a problem with typesetting LaTeX using both Greek and English characters. All this time, I've been using the polyglossia+fontspec packages which allowed me to change between Greek and English just by changing language on my keyboard.

This combination allows me to choose the fonts that I will use, but when letters in math mode mix with letters outside of math mode, the result is not so aesthetic. A solution to this is to substitute all math mode letter with \textrm, but I hope to find something less tiresome.

I actually want to change the font that I am using to, say, Kerkis. What I found online is that I have to add the following two packages


Adding these two packages (while removing fontspec) makes the file to not even compile.

So, my question is: how can I change the typesetting font in and out of math mode (let's say to Kerkis) while keeping the ability to change language without having to use a TeX command?

Edit: I used the mathspec package instead of fontspec, downloaded Kerkis fonts and manually added them using these:


Still, it feels like a half-measure since I'm feeling like I should just load a "Kerkis" package or something that would do the job for me, shouldn't I?

  • When the alfabet is Latin, glyphs in math mode should also look different as those in text mode. – Przemysław Scherwentke Jan 8 '18 at 13:53
  • Please give a real, compilable example of font combinations you find unsatisfactory. – Mico Jan 8 '18 at 14:13
  • @mico any font i try in greek language except from the latex defaults does not seem fine. – royal with cheese Jan 8 '18 at 14:22
  • Does my answer in this question helps? :(tex.stackexchange.com/q/396528/120578 ) It is about XeLaTeX for these languages and you can chose font for math and for text at any time... – koleygr Jan 8 '18 at 14:25
  • Nice approach but I do not know if it answers my question exactly. I still only use greek letters outside of math mode. For math mode I restrict myself to latin characters. – royal with cheese Jan 8 '18 at 15:34

Here is the solution I suggested in the comment above:

\usepackage{mathspec}%[MnSymbol]{mathspec} %<-No need for this in this example
\setallmainfonts{Linux Libertine O}
\setmainfont{Linux Libertine O}
%\newfontfamily\greekfont{Linux Libertine O}

% Definitions of Greek (in math mode)
\let\oldgamma\gamma %<-see the difference below



English text

$$α=\frac{β}{γ_s \text{ or }\oldgamma_s} \text{ or }\alpha=\frac{\beta}{\gamma_\sigma} \text{ and } 6_p$$


Ελληνικό κείμενο εδώ

$$α=\frac{β}{γ_s \text{ or }\oldgamma_s} \text{ or }\alpha=\frac{\beta}{\gamma_\sigma} \text{ and } 6_p$$


English text

$$α=\frac{β}{γ_s \text{ or }\oldgamma_s} \text{ or }\alpha=\frac{\beta}{\gamma_\sigma} \text{ and } 6_p$$


Ελληνικό κείμενο εδώ

$$α=\frac{β}{γ_s \text{ or }\oldgamma_s} \text{ or }\alpha=\frac{\beta}{\gamma_\sigma} \text{ and } 6_p$$



enter image description here

PS: The package MnSymbol didn't used here and see the correction on the \oldgamma spacing.

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