1. A method for delivering an announcement in one or more languages, the method comprising the steps of: a computer receiving input representative of audio from one or more human speakers speaking in one or more natural languages; the computer processing the input to identify the one or more natural languages being spoken; the computer determining a relative proportion of each of the identified one or more natural languages; the computer determining one or more natural languages in which to deliver the announcement based, at least in part, on the determined relative proportion of each of the identified one or more natural languages; and the computer causing to be delivered the announcement in the determined one or more natural languages.