Translating Templates?

Translating Templates?

So we are a multi-language institution. We have a primary language as well as English.
When we do Incident Requests Templates or Service Request Templates we mostly do them in English since we have to pick one.

But then I noticed that on the Requester Home-page it's possbile to specify Language for all the text-labels and they switch when the requester or technician change their interface language.

How can do this in Templates?
(Making separate templates for each language is not an option)