Facebook created two AI chatbots named Alice and Bob but shut them down when they stopped communicating in English because it wasn’t as efficient as the language they developed themselves. – WTF Fun Facts
Source: https://www.theatlantic.com/technology/archive/2017/06/what-an-ais-non-human-language-actually-looks-like/530934/
English is highly inefficient and unspecific. If you have German, Russian or a Skandinavian language as base for example, English not only looks laughably easy in comparison. You will also lack a lot of words to express yourself the fullest and therefore will always seem to be a bit dumber than in your main language.