+%<en> \documentclass[a4paper,titlepage]{article}
+%<ja> \documentclass[a4paper,titlepage]{ltjsarticle}
+%<zh> \documentclass[a4paper,titlepage]{ltjsarticle}
+
+\makeatletter
+\let\ltjpkglist\empty
+\newif\if@real@append@list
+\def\@append@newentry#1#2{{%
+ \@real@append@listtrue \def\@tempa{#2}%
+ \let\@pkglist\@append@newentry@pkglist#1%
+ \if@real@append@list
+ \let\@pkglist=\relax\xdef#1{#1\@pkglist{#2}}%
+ \fi}}
+\def\@append@newentry@pkglist#1{%
+ \def\@tempb{#1}%
+ \ifx\@tempa\@tempb\@real@append@listfalse\fi}
+\def\@addtofilelist#1{\@append@newentry\ltjpkglist{#1}}
+\let\@listfiles\empty
+\makeatother
+