A sample of a multilingual document (Arabic, Greek, Hebrew, Japanese, Serbian, etc.) created with babel and lualatex.
See also the following resources:
Multilingual typesetting on Overleaf using babel and fontspec (XeLaTeX and LuaLaTeX)
Gallery example here
Multilingual typesetting on Overleaf using polyglossia and fontspec (XeLaTeX and LuaLaTeX)
Gallery example here
xcolor names can contain CJK characters! So here are some Chinese and Japanese traditional colour names like 丁香色, 御召御納戸 . CJK-related packages not required if your document doesn't need to display any CJK text.