To reproduce: 1. Open doc/el/Intro.lyx 2. In Document > Settings > Fonts, check the box "Use non-TeX fonts" and change the three fonts to FreeSans (or any other font that supports Greek). 3. Click OK. 4. Try to export with XeTeX. It fails for me with:
! LaTeX Error: \begin{description} on input line 322 ended by \end{otherlanguag Looking at the exported .tex file, I see \begin{english}% \begin{description} \item [{\TeX{}\textgreek{:}}] \textgreek{Τυπογραφική γλώσσα με δυνατότητες μακροεντολών.} \item [{\LaTeX{}\textgreek{:}}] \textgreek{Πακέτο μακροεντολών βασισμένο στο }\TeX{}\textgreek{\@.} \end{english}% [skipped lines] \end{description} This does not seem right. Any ideas? Scott