There is more than sufficient scope for misunderstanding / confusion / inadvertent offense within the confines of English English, Irish English, American English, International English, Canadian English, Australian English and all the other iterations of what, in itself, is a somewhat cosmopolitan language. Add in regional variants within each iteration and matters get even worse. All within a 'common' language! A 'tongue-in-cheek' example of this would be the term "US English" - in English English, 'US' is frequently used to mean either 'Unserviceable' or 'Useless'. Elsewhere in the world, I feel sure that it is rarely thought of in those terms. Usage and abusage vary widely in such an idiomatic language. Laudable though it would be in principle to have multiple languages, I feel that the true effect would be divisive, of benefit to very few indeed and to the probable detriment of the great majority. There is a strong possibility that the effect would be to 'dumb down' a vibrant Forum until people simply departed silently, pausing only to check for updates from time to time.