amiri : High quality Arabic Naskh-style font ( http://www.amirifont.org/ )
noto : Google's font family that aims to support all the world's languages ( https://www.google.com/get/noto/ https://github.com/notofonts/notofonts.github.io )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a tatsh-overlay
For Paludis use this rsync : rsync://gentoo.zugaina.org/tatsh-overlay-portage
If you have a problem : ycarus(-at-)zugaina.org