rtBiz HelpDesk is translation ready and you can check the translations over here :
https://rtbiz.io/translate/projects/rtbiz-helpdesk/
You can also contribute to the community by providing your language translation for rtBiz HelpDesk. Here is an article which will help you to translate rtBiz HelpDesk into the language of your choice :
https://rtbiz.io/docs/helpdesk/rtbiz-helpdesk-translation/rtbiz-helpdesk-translation-ready/