Linux Libertine O: Ligatures? | XeLaTeX

Question

I'm currently studying the fontspec documentation, for a project I'm doing.

I've found an issue, where neither ligatures (all except TeX) work, nor numbers in the OldStyle option work with the Linux Libertine O font. Additionally, quotes in the ‘british’ style, don't work either, although I'm not sure if that has something to do with the font.

MWE:

\documentclass[ngerman]{article}
\usepackage[main=ngerman,british]{babel}
\usepackage{csquotes}
\usepackage{fontspec}

\defaultfontfeatures[Linux Libertine O]{
    UprightFont={*},
    BoldFont= {* Bold},
    ItalicFont={* Italic},
    BoldItalicFont={* Bold Italic},
    Ligatures={Common},
    Numbers={OldStyle},
}
\setmainfont{Linux Libertine O}

\begin{document}
fi fh fl ff tz st ct
    \selectlanguage{british}
\enquote{enquoted text}
\end{document}

Answer 1

[Disclaimer: I'm the developer of the VerbTeX app]

You can find a working example at https://en.wikipedia.org/wiki/XeTeX which shows an example including ligatures using the Linux Libertine O Italic font.

Anyway, there seems to be an issue with the normal font. Maybe it has to do with the 85% support for ligatures mentioned at https://fontlibrary.org/en/font/linux-libertine.

In any case: We'll look into that in detail. In the meantime you can use an own font file (.otf or .ttf) which should solve this issue as well.