3.3.7.2 Sending Language Profile Information PDU
Upon receiving a notification from the client-side text services framework that the current active language profile has changed, the client MUST then send the new active language profile information to the server using the Language Profile Information PDU (section 2.2.2.10.1). This enables the server to stay in sync with the current active language of the client.
Upon receiving this PDU from the client, the server SHOULD change the current server-side active language profile, by using the information sent by the client. This ensures that the server uses the same active language profile as the one being used by the client.