Captcha with Foreign Languages

Hi,

I have successfully implemented the CodeIgniter Captcha in English,

But how do you handle foreign languages?

For example:
http://www.mydomain.com/en/myform displays the captcha correctly in English,

but

http://www.mydomain.com/ar/myform still displays the captcha in English and I want it in Arabic.

I have tried searching this forum and google, but haven't found anything helpful,

Any help much appreciated (any code examples would be even better)