\begin{saveblock}{baseDocument}
    \begin{highlightblock}[linewidth=0.5\textwidth,gobble=8]
        \documentclass{article}
        \usepackage[utf8]{inputenc}

        \title{My document}
        \author{Vincent Kuhlmann}
        \date{1 May 2021}

        \begin{document}
        \maketitle
        \section{Introduction}

        ~\lang,Hello everyone!,Hallo iedereen!,~
        \end{document}
    \end{highlightblock}
\end{saveblock}

\addtorecentlist{\lang,simple,simpel, document}

\begin{frame}
    \frametitle{\lang,Simple,Simpel, document}

    \begin{columns}
        \begin{column}{0.5\textwidth}
            \useblock{baseDocument}
        \end{column}
        \begin{column}{0.5\textwidth}
            \lang
            {\includegraphics[width=\linewidth]{\assetdir/basicDocumentOutputEN.pdf}}
            {\includegraphics[width=\linewidth]{\assetdir/basicDocumentOutput.png}}
        \end{column}
    \end{columns}
\end{frame}