# How to use polyglossia with biblatex?

Using polyglossia and biblatex together leads to an error:

! Package biblatex Error: Patching 'babel' package failed.

See the biblatex package documentation for explanation.
Type  H <return>  for immediate help.
...

l.4 \begin{document}

? h
This is an internal issue typically caused by a conflict
between biblatex and some other package. Modifying
?


The minimal failing example is:

\documentclass{article}
\usepackage{polyglossia}
\usepackage{biblatex}
\begin{document}
test
\end{document}


And despite the error message, reversing the order of the two packages doesn't help. I have updated files as of the last MiKTeX package update (June 3, 2013). The error occurs with both XeLaTeX and LuaLaTeX.

I'm not necessarily intending to use multiple languages in the bibliography; I just want to be able to use polyglossia for the main text of the document. How can I do this?

-
The MWE works for me if I specify a document language via \setmainlanguage{<lang>} –  clemens Jun 18 '13 at 9:31

This is due to a polyglossia update in TL 2013 which broke the ability of biblatex to patch a babel compat macro which polyglossia uses. The development version of biblatex (2.7) fixes this and will be released soon. Bear in mind that biblatex doesn't fully support polyglossia anyway (only babel at the moment).