Update docs (mostly), fixes, etc

docs/parts/reference/intro.tex

@@ -2,11 +2,10 @@
 \section{Full Command Reference}
 \subsection{Variables}
 \begin{itemize}
-    \item \textit{scope}: \texttt{minimal}, \texttt{most}, \texttt{recommended}, \texttt{all} or \texttt{letter}
     \item \textit{string}: Any normal text
+    \item \textit{boolean}: \texttt{true} or \texttt{false}
     \item \textit{math}: Any math input
     \item \textit{number}: Any non-negative integer, i.e. no commas
-    \item \textit{color}: Any of the \texttt{dvipsnames} colours of \texttt{xcolor}
-    \item \textit{langauge}: 2-character country code (currently only \texttt{de} and \texttt{en} supported)
+    \item \textit{color}: Any of the \texttt{dvipsnames} colours of \texttt{xcolor} or as defined in the color config file
 \end{itemize}