how to make vim properly render RTL (Right to Left) languages

Question

I get this on my vim:

but the arabic translation is showing all messed up (in reverse orderlike dessem pu)

it should instead show like this (this is rendered in source tree:)

How to I make this work? (note: I'm using the terminal version of mac:

VIM - Vi IMproved 8.0 (2016 Sep 12, compiled Sep 14 2017 18:28:18)
MacOS X (unix) version
Included patches: 1-1100
Compiled by Homebrew
Huge version without GUI.  Features included (+) or not (-):
+acl             +file_in_path    +mouse_sgr       +tag_old_static
+arabic          +find_in_path    -mouse_sysmouse  -tag_any_white
+autocmd         +float           +mouse_urxvt     -tcl
-balloon_eval    +folding         +mouse_xterm     +termguicolors
-browse          -footer          +multi_byte      +terminal
++builtin_terms  +fork()          +multi_lang      +terminfo
+byte_offset     -gettext         -mzscheme        +termresponse
+channel         -hangul_input    +netbeans_intg   +textobjects
+cindent         +iconv           +num64           +timers
-clientserver    +insert_expand   +packages        +title
+clipboard       +job             +path_extra      -toolbar
+cmdline_compl   +jumplist        +perl            +user_commands
+cmdline_hist    +keymap          +persistent_undo +vertsplit
+cmdline_info    +lambda          +postscript      +virtualedit
+comments        +langmap         +printer         +visual
+conceal         +libcall         +profile         +visualextra
+cryptv          +linebreak       +python          +viminfo
+cscope          +lispindent      -python3         +vreplace
+cursorbind      +listcmds        +quickfix        +wildignore
+cursorshape     +localmap        +reltime         +wildmenu
+dialog_con      -lua             +rightleft       +windows
+diff            +menu            +ruby            +writebackup
+digraphs        +mksession       +scrollbind      -X11
-dnd             +modify_fname    +signs           -xfontset
-ebcdic          +mouse           +smartindent     -xim
+emacs_tags      -mouseshape      +startuptime     -xpm
+eval            +mouse_dec       +statusline      -xsmp
+ex_extra        -mouse_gpm       -sun_workshop    -xterm_clipboard
+extra_search    -mouse_jsbterm   +syntax          -xterm_save
+farsi           +mouse_netterm   +tag_binary
   system vimrc file: "$VIM/vimrc"
     user vimrc file: "$HOME/.vimrc"
 2nd user vimrc file: "~/.vim/vimrc"
      user exrc file: "$HOME/.exrc"
       defaults file: "$VIMRUNTIME/defaults.vim"

update

arabic support is even worse on mlterm

Answer 1

Vim only supports displaying files containing mixed RTL and LTF text in a terminal which also supports this (such as mlterm). (You're not using GUI Vim, but I'll note for future readers that it is also not supported there.)

If your terminal does support this, you will also need to ensure that the 'termbidi' option is set. This is set by default when Vim is running under mlterm, and unset otherwise.

See :help 'termbidi' and :help arabic.txt for more details.