Themes\...........\languages\index.english.php
ประมาณบรรทัดที่ 11 ถึง 16
จาก
$txt['lang_locale'] = 'en_US';
$txt['lang_dictionary'] = 'en';
$txt['lang_spelling'] = 'american';
// Character set and right to left?
$txt['lang_character_set'] = 'ISO-8859-1';
เป็น
$txt['lang_locale'] = 'th_TH';
$txt['lang_dictionary'] = 'th';
$txt['lang_spelling'] = 'thai';
// Character set and right to left?
$txt['lang_character_set'] = 'TIS-620';