commit https://github.com/vim/vim/commit/b8060fe862f684b591f9ac679eac5b2594d6c5a0 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Jan 19 22:29:28 2016 +0100 patch 7.4.1142 Problem: Cannot define keyword characters for a syntax file. Solution: Add the ":syn iskeyword" command. (Christian Brabandt)

For information about installation of Farsi fonts and Vim usage in Farsi mode,
refer to the Farsi help file by typing ":help farsi" in Vim.