+
+\ifdefined\fontseriesforce
+%%%% LaTeX 2020-02-02
+\DeclareRobustCommand\romanseriesforce[1]{\edef\f@series{#1}}
+\DeclareRobustCommand\kanjiseriesforce[1]{\edef\k@series{#1}}
+\DeclareRobustCommand\fontseriesforce[1]{\kanjiseries{#1}\romanseries{#1}}
+\DeclareRobustCommand\romanshapeforce[1]{\edef\f@shape{#1}}
+\DeclareRobustCommand\kanjishapeforce[1]{\edef\k@shape{#1}}
+\DeclareRobustCommand\fontshapeforce[1]{\kanjishape{#1}\romanshape{#1}}
+
+\def\merge@font@kanji@series#1{%
+ \expandafter\expandafter\expandafter
+ \merge@font@kanji@series@
+ \csname series@\k@series @#1\endcsname
+ {#1}%
+ \@nil
+}
+\def\set@target@kanji@series#1{%
+ \edef\k@series{#1}%
+ \edef\k@series{\expandafter\series@drop@one@m\k@series mm\series@drop@one@m}%
+}
+\def\merge@font@kanji@series@#1#2#3\@nil{%
+ \def\@reserveda{#3}%
+ \ifx\@reserveda\@empty
+ \set@target@kanji@series{#2}%
+ \else
+ \begingroup\let\f@encoding\k@encoding\let\f@family\k@family
+ \maybe@load@fontshape\endgroup
+ \edef\@reserveda{\k@encoding /\k@family /#1/\k@shape}%
+ \ifcsname \@reserveda \endcsname
+ \set@target@kanji@series{#1}%
+ \else
+ \ifcsname \k@encoding /\k@family /#2/\k@shape \endcsname
+ \set@target@kanji@series{#2}%
+ \@font@shape@subst@warning
+ \else
+ \set@target@kanji@series{#3}%
+ \@font@shape@subst@warning
+ \fi
+ \fi
+ \fi
+}
+\def\merge@font@kanji@shape#1{%
+ \expandafter\expandafter\expandafter
+ \merge@font@kanji@shape@
+ \csname shape@\k@shape @#1\endcsname
+ {#1}%
+ \@nil
+}
+\def\merge@font@kanji@shape@#1#2#3\@nil{%
+ \def\@reserveda{#3}%
+ \ifx\@reserveda\@empty
+ \edef\k@shape{#2}%
+ \else
+ \maybe@load@fontshape
+ \edef\@reserveda{\k@encoding /\k@family /\k@series/#1}%
+ \ifcsname \@reserveda\endcsname
+ \edef\k@shape{#1}%
+ \else
+ \ifcsname \k@encoding /\k@family /\k@series/#2\endcsname
+ \edef\k@shape{#2}%
+ \@font@shape@subst@warning
+ \else
+ \edef\k@shape{#3}%
+ \@font@shape@subst@warning
+ \fi
+ \fi
+ \fi
+}
+\DeclareRobustCommand\romanseries[1]{\merge@font@series{#1}}
+\DeclareRobustCommand\kanjiseries[1]{\merge@font@kanji@series{#1}}
+\DeclareRobustCommand\fontseries[1]{%
+ \merge@font@series{#1}\merge@font@kanji@series{#1}}
+\DeclareRobustCommand\romanshape[1]{\merge@font@shape{#1}}
+\DeclareRobustCommand\kanjishape[1]{\merge@font@kanji@shape{#1}}
+\DeclareRobustCommand\fontshape[1]{%
+ \merge@font@shape{#1}\merge@font@kanji@shape{#1}}
+\else
+%%%% LaTeX 2019-10-01