As I note, some functions of PHP which Moodle are using don't support UTF-8.

I'll take an example with the glossary module. They are the functions handling strings:

• substr ()

• strtoupper ()

In fact, using the functions, some Vietnamese characters could not be displayed properly (more information at http://moodle.org/mod/forum/discuss.php?d=25725)

I dealt with the situation by replacing them by:

• mb_substr ()

• mb_strtoupper()

As you know, these support UTF-8 and it worked for Vietnamese. I don’t know whether Chinese and Japanese, and other languages have the same problem.

I think we should consider that in the future versions of Moodle so that Moodle can support completely all languages in the world.