1. A computer-implemented method performed in a communication system, the communication system for effecting a voice or video call between at least a source user speaking a source language and a target user speaking a target language, the method comprising: receiving call audio of the call, the call audio comprising speech of the source user in the source language; performing, by a speech translator module, an automatic translation procedure on the call audio to generate an audio translation of the source user's speech in the target language for outputting to the target user; and signalling, by the speech translator module, a change in behaviour of the automatic translation procedure, the change relating to the generation of the automatic translation, and thereby causing a notification to be outputted to the target user to notify the target user of the change, the notification corresponding to the change in behaviour of the translation procedure and including a synthetic video embodied as a visual action by an animated avatar mimicking visual cues of a human.
1. A computer-implemented method performed in a communication system, the communication system for effecting a voice or video call between at least a source user speaking a source language and a target user speaking a target language, the method comprising: receiving call audio of the call, the call audio comprising speech of the source user in the source language; performing, by a speech translator module, an automatic translation procedure on the call audio to generate an audio translation of the source user's speech in the target language for outputting to the target user; and signalling, by the speech translator module, a change in behaviour of the automatic translation procedure, the change relating to the generation of the automatic translation, and thereby causing a notification to be outputted to the target user to notify the target user of the change, the notification corresponding to the change in behaviour of the translation procedure and including a synthetic video embodied as a visual action by an animated avatar mimicking visual cues of a human. 8. The computer-implemented method according to claim 1 wherein the notification comprises a visual notification for displaying at a target user device of the target user and/or an audio notification for playing out at the target user device and/or a tactile notification outputted by actuating a mechanical component of the target user device.