“How can one be wrong,
when the message is one of getting along.”
There are a few world cooperative projects that take far more than one single town can provide. For example when new mirrors are needed for a telescope in Hawaii. People from all over the world interested in astronomy make one mirror each and take them to Hawaii. This way no one town is burdened.
In the spirit of communication everyone now speaks English. English is taught in conjunction with the local language from day one, so everyone is fluent in at least two languages.
There are now four English dictionaries. Base English has 20,000 words and is spoken by everyone. Common English has 40,000 words and is spoken by most. Tech English has 100,000 words. It's made up of Common English plus words used in science and technology. Open English has 1,000,000 words and is for wordies. There's software that can translate Tech English into Common and Base so everyone understands.
In what was called New Zealand, now Aotearoa, the first language is Maori with English as a second language. This is not only right but practical as well. In South America, an indigenous person, to be a worldly person would need to learn their local language plus Spanish or Portuguese and English. For those who love languages, no problem but for everyone else, not likely.
Considering the problems caused by communication breakdowns, giving up the language of one's ancestors over a few generations and adopting the indigenous language was seen as a small price to pay. Besides it's only right to learn the language of the people who live in the place one moves to.
In England with the evolution of language the way it is and Common English having to change much slower than local dialects. Already in the different regions of England, the different dialects are becoming new languages.