Because there have been many many times throughout history where people have adopted a foreign language in addition to their own, English being the prime example. Most people who speak English are not native speakers. There has never been an example of a constructed auxiliary language catching on in anything more than hobbyist communities and hippy communes.
People at large scale learn languages for practical reasons, not reasons of fairness.
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History shows that's certainly not more likely, and no constructed language will be without bias towards some group of natural languages.
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Because there have been many many times throughout history where people have adopted a foreign language in addition to their own, English being the prime example. Most people who speak English are not native speakers. There has never been an example of a constructed auxiliary language catching on in anything more than hobbyist communities and hippy communes.
People at large scale learn languages for practical reasons, not reasons of fairness.
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