This is the Chrome page discussing language settings: https://support.google.com/chrome/answer/95416?hl=ar
Arabic has a variety of language codes, the question becomes which one? Find this line (appx 33) in "config.asp" and change the LCID.
Session.LCID = 1033
Arabic - Saudi Arabia 0401 1025
Arabic - Algeria 1401 5121
Arabic - Bahrain 3c01 15361
Arabic - Egypt 0c01 3073
Arabic - Iraq 0801 2049
Arabic - Jordan 2c01 11265
Arabic - Kuwait 3401 13313
Arabic - Lebanon 3001 12289
Arabic - Libya 1001 4097
Arabic - Morocco 1801 6145
Arabic - Oman 2001 8193
Arabic - Qatar 4001 16385
Arabic - Syria 2801 10241
Arabic - Tunisia 1c01 7169
Arabic - U.A.E. 3801 14337
Arabic - Yemen 2401 9217
Next, in "inc_header.asp", look for these lines (appx 35-37):
%>
<!--#INCLUDE FILE="inc_func_common.asp" -->
<%
Immediately after them, insert these:
Response.Charset="UTF-8"
Response.CodePage=65001