Helpdesk Solution ships with the following Core languages besides English: French, German, Japanese, Portuguese (Brazilian), Simplified Chinese and Spanish.

Arabic, Danish, Italian, Russian and Swedish Language Packs have now been released:

Arabic for Helpdesk: https://kb.altiris.com/article.asp?article=34106&p=3
Danish for Helpdesk: https://kb.altiris.com/article.asp?article=33800&p=3
Italian for Helpdesk and NS: https://kb.altiris.com/article.asp?article=28246&p=3
Russian for Helpdesk and NS: https://kb.altiris.com/article.asp?article=33480&p=3
Swedish for Helpdesk: https://kb.altiris.com/article.asp?article=33805&p=3