> People who speak different lanaguges litteraly "think differently" This widely held belief is absolutely not a proven fact. It's called linguistic relativity

> People who speak different lanaguges litteraly "think differently" This widely held belief is absolutely not a proven fact. It's called linguistic relativity or linguistic determinism [1] and the strong form (language determines thought) has not been taken seriously by researchers in the field for a while. The weak form (language can have somewhat of an impact on the way you think) has not been proven or disproven and is a topic of debate. You just state it as if it was known, even though the causal relationship of most examples you could name can easily be the other way around (culture / thinking affects how a language develops). I'd argue that everyone learning and speaking the same language would have immense benefits for a global society. You can keep recordings in museums and linguistic researchers to keep a historical record of languages, just like we have for other tools and methods that we no longer have any use for. [1]: https://en.wikipedia.org/wiki/Linguistic_relativity https://en.wikipedia.org/wiki/Linguistic_relativity