WebID Profile or related resources to indicate an agent's preferred language for UI

[csarven]

An agent may know or have certain language skills, and they may be expressing this in their profile.

Those languages may not be the same languages that they prefer for an application to use on the UI.

So, what essentially needs to be expressed is something like:

Agents prefers to use language X (or Y, Z..) for app A or all apps.