Mukhlas Rowi gives a tips on how to enable non-Arabic wordpress to suport writing in Arabic letters / alphabet:
Notes: It applies for Self-hosted WordPress only. It should work with other specific characters as well such as Hebrew, Persian (Farsi), Urdu, etc
I. Enable writing Arabic in Posting:
- Find the table wp_post or wordpress_post in your PhpMyAdmin Sql.
- Change the field database collation from latin1_general_ci into utf8_general_ci
- Done
II. Enable typing Arabic in Comment:
- Find the table wp_comment in your PhpMyAdmin Sql
- Change the field database collation from latin1_general_ci into utf8_general_ci
- Done
Screenshot by Mukhlas Rowi

Nice informations
Semakin menambah ilmu kita informasi dari anda
[...] Enabling Arabic Script Support in Non Arabic WordPress [...]
[...] Enabling Arabic Script Support in Non Arabic WordPress [...]
DOes Not work for me! another?
Hello again,
the problem is on Word Adds On, i found solution right here
http://m-alwi.com/posting-dengan-huruf-arab-di-wordpress-self-hosting.html
thanks for your post!