I have bunch of created integration projections with a quite long list of published endpoints. The consumer of the endpoints wants to get the data return in their language. I thought an stable solution was to put the integration user used, with a default language. So, on the IFS user, set the preferred language and then the rest call (using this user) would get the states, error messages, etc in this language. But it doesn't seems to work.

Anyone that could bring some light over  this question, how I could get translated values/messages returned out from my endpoints?

I am on App10 environment.