You would be having customers all around the world and our helpdesk does support a global reach to customers in their respective languages. The feature that aids this is called "Multilingual Support" which is available from our Garden plan.
Say, for example, you would want to support articles in Chinese, French, apart from English which is your default/primary portal language. Please navigate to Admin -> Account -> Helpdesk Settings where you would see an option called "Manage Languages" which would allow you to add Chinese and French as well. Next, to these languages, you would have an option called "Hidden on portal" which when clicked upon would make the language visible on the portal.