Most Efficient Language (when spoken) ?

https://www.realclearscience.com/blog/2015/06/whats_the_most_efficient_language.html

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process above to determine the speech information rate of seven of the world's most spoken languages: English, French, Italian, Japanese, Spanish, Mandarin, and German.

Interestingly, the languages that conveyed the least amount of information per syllable, like Spanish, Japanese, and French, tended to be spoken at a faster rate. This allowed these languages (apart from Japanese) to deliver a similar amount of information compared to more meaning-dense languages like Mandarin and English.

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