docs(manual): Note repeated hyphen rules apply in Croatian, Czech, Po…

…rtuguese, Slovak, and Spanish

documentation/c08-language.sil

@@ -163,6 +163,19 @@ The default is \code{left}.
 \set[parameter=languages.am.justification,value=centered]
 \font[family=Noto Sans Ethiopic,language=am]{ሰላም፡ልዑል}
 
+\begin[command=document-repeated-hyphen]{define}
+According to \process typography conventions, when a break occurs at an explicit hyphen, the hyphen gets repeated at the beginning of the new line.
+SILE automatically handles this.
+\end{define}
+
+\subsection{Croatian}
+
+\document-repeated-hyphen{Croatian}
+
+\subsection{Czech}
+
+\document-repeated-hyphen{Czech}
+
 \subsection{Esperanto}
 
 \define[command=eo]{\font[language=eo]{\process}}
@@ -188,8 +201,19 @@ The size of these spaces is determined by
 
 \subsection{Polish}
 
-According to Polish typography conventions, when a break occurs at an explicit hyphen, the hyphen gets repeated at the beginning of the new line.
-SILE automatically handles this.
+\document-repeated-hyphen{Polish}
+
+\subsection{Portuguese}
+
+\document-repeated-hyphen{Portuguese}
+
+\subsection{Slovak}
+
+\document-repeated-hyphen{Slovak}
+
+\subsection{Spanish}
+
+\document-repeated-hyphen{Spanish}
 
 \subsection{Turkish}