Abstract: The disclosure pertains to a 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. A translation procedure is performed on call audio of the call to generate an audio translation of the source user's speech in the target language for outputting to the target user. A notification is outputted to the target user to notify the target user of a change in the behavior of the translation procedure, the change relating to the generation of the translation.

Abstract: There is provided an apparatus comprising at least one processor and a memory comprising code that, when executed on the at least one processor, causes the apparatus to receive an input user setting relating to relative volumes of the speech data in a preferred language and speech data in a non-preferred language when the speech data is played-out; and cause play-out of received speech data so that the volume of the played-out speech data is set in dependence on the user input and whether the received speech data is in the preferred language or the non-preferred language.

Abstract: Call audio of a call between a source user speaking a source language and a target user speaking a target language is received from a remote source user device of a source user via a communication network of a communication system, the call audio comprising speech of the source user in the source language. An automatic speech recognition procedure is performed on the call audio. A translation of the source user's speech is generated in the target language using the results of the speech recognition procedure. A translated synthetic speech audio version of the source user's speech is mixed with the source user's call audio and/or with translated audio of the target user's speech in the source language. The mixed audio signal is transmitted to a remote target user device of the target user via the communication network for outputting to at least the target user during the call.

Abstract: The disclosure pertains to a 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. A translation procedure is performed on call audio of the call to generate an audio translation of the source user's speech in the target language for outputting to the target user. A notification is outputted to the target user to notify the target user of a change in the behaviour of the translation procedure, the change relating to the generation of the translation.