+%<*en>
+Note that color specification in font~definitions, such as
+\begin{lstlisting}
+\font\test=file:lmromandunh10-regular.otf:color=FF0000BB % \font primitive
+\addfontfeatures{Color=00FF00} % fontspec
+\end{lstlisting}
+are not compatible with \LuaTeX-ja in plain \LuaTeX\ and \LaTeX~2019-10-01~(or prior).
+So we recommend to use \LaTeX~2020-02-02.
+%</en>
+%<*ja>
+なお,フォント定義の際の色指定,例えば
+\begin{lstlisting}
+\font\test=file:lmromandunh10-regular.otf:color=FF0000BB % \font primitive
+\addfontfeatures{Color=00FF00} % fontspec
+\end{lstlisting}
+は,plain \LuaTeX や\LaTeX~2019-10-01以前において\LuaTeX-jaとは\emph{共存しない}.
+そのため,\LaTeX~2020-02-02以降を用いることを勧める.
+%</ja>