latex-cjk-common binary package in Ubuntu Bionic amd64

 CJK is a macro package for LaTeX to enable typesetting in Chinese,
 Japanese, Korean and Thai, and it supports Vietnamese through the
 "vntex" macro. And you can still use Russian, Greek and other
 languages in the same document.
 It supports various CJK encodings, like UTF-8, Big5, GB, JIS, KS,
 CNS (through CEF) and Emacs MULE.
 .
 This package will install the common files, as well as a few
 GNU/Emacs Lisp files, and it provides support for furigana
 ("ruby text") and PinYin, either with or without tone marks.

Source package