# TikZ: Interference between polyglossia and quotes library

When setting the language for polyglossia to German, one runs into trouble with the quotes library from TikZ: Handing over a label to the angle pic as suggested on page 511 in the pgfmanual fails when the whole tikzpicture is used as newcommand argument.

I give three examples below: The first works as expected (tikzpicture is not used inside a macro), the second throws an error (using it inside a macro), the third tried to circumvent the problem by using the text= option but results in no label for the angle.

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{angles, quotes}
\RequirePackage{polyglossia}
\setdefaultlanguage{german}
\newcommand{\figC}[1]{\begin{center}#1\end{center}}

\begin{document}

This one works due to 'quotes' library:
\begin{center}
\begin{tikzpicture}\shorthandoff{"}
\draw (2,0) coordinate (A) -- (0,0) coordinate (B) -- (1,1) coordinate (C)
pic ["$\alpha$", draw] {angle};
\end{tikzpicture}
\end{center}

This one throws an error:
\figC{\begin{tikzpicture}\shorthandoff{"}
\draw (2,0) coordinate (A) -- (0,0) coordinate (B) -- (1,1) coordinate (C)
pic ["$\alpha$", draw] {angle};
\end{tikzpicture}}

This one compiles but does not show the label (using 'text=' as I understood from pgfmanual p. 511):
\begin{center}
\begin{tikzpicture}
\draw (2,0) coordinate (A) -- (0,0) coordinate (B) -- (1,1) coordinate (C)
pic [text={$\alpha$}, draw] {angle};
\end{tikzpicture}
\end{center}

\end{document}


The questions are:

• Should I file this somewhere as a bug, or is it my fault?
• Can I somehow protect the tikzpicture when I want to use it inside a macro?
• Or are there any other suggestions?

In the third example you have to use pic text instead only text. Options for the angle label can be added using pic text options:

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{angles, quotes}
\RequirePackage{polyglossia}
\setdefaultlanguage{german}
\newcommand{\figC}[1]{\begin{center}#1\end{center}}

\begin{document}
\begin{center}
\begin{tikzpicture}
\draw (2,0) coordinate (A) -- (0,0) coordinate (B) -- (1,1) coordinate (C)
pic [pic text={$\alpha$},draw] {angle};
\end{tikzpicture}
\end{center}
\begin{center}
\begin{tikzpicture}
\draw (2,0) coordinate (A) -- (0,0) coordinate (B) -- (1,1) coordinate (C)
pic [pic text={$\alpha$},pic text options={red,font=\tiny}, draw] {angle};
\end{tikzpicture}
\end{center}
\end{document}