Even after following the Installation FAQ (http://docs.limesurvey.org/tiki-index.php?page=Installation+FAQ) both submitting multibyte language text at runtime and in survey setup resulted in question marks being stored in the database. When I tested the database by inserting multibyte text into the same fields using phpmyadmin, the data was stored correctly. When viewing the data added by phpmyadmin in limesurvey, it appeared correctly, but when it was saved it was overwritten with question marks.

To resolve this issue, I had to make the following modification to common.php:

=== modified file 'common.php'
--- common.php 2009-08-31 03:55:59 +0000
+++ common.php 2009-09-09 01:26:11 +0000
@@ -214,7 +214,8 @@
{
safe_die ("<br />Error: You need at least MySQL version 4.1 to run LimeSurvey. Your version:".$infoarray['version']);
}

• @$connect->Execute("SET CHARACTER SET 'utf8'"); //Checked
• @$connect->Execute("SET CHARACTER SET 'utf8'"); //Checked
• @$connect->Execute("set names 'utf8'");
  }