\usepackage[turkish]{babel} and \includegraphics inconcistency

Question

Here is my document :

\documentclass[12pt]{book}

% must-have packages
\usepackage[turkish]{babel}
\usepackage[utf8]{inputenc} % This package will support Turkish chars
% must-have packages

\usepackage[a4paper,left=2.5cm,right=2cm]{geometry}
\usepackage{graphicx}
\usepackage{listings}

% settings
\setcounter{secnumdepth}{0}
% settings

\begin{document}

\framebox{\includegraphics[scale=0.5]{./images/image_3.png}}

\end{document}

When I try to build a pdf out of this file I received bunch of errors. here is one of them :

Missing \endcsname inserted ...graphics[scale=0.5]{./images/image_3.png}}

When I remove the babel package, it runs smoothly. Even when I change the language to another language, it runs as well.

What is happening here?

Answer 1

I believed that this problem had been solved, but it seems not.

Since you can input directly Turkish specific characters as Unicode, you should not need the = shortcuts; so

\begin{document}
\shorthandoff{=}

will cure the problem. In case you really need the shortcuts with =, the unique way seems to be to say

\shorthandoff{=}

before all \includegraphics commands and \shorthandon{=} again after them.

Answer 2

Please check the answers on this question: \newgeometry doesn't work with Turkish babel package. One answer by @karlkoeller gives an automatic way of switching the shorthand off before \includegraphics then on again after it.