Should You Prompt AI in English?
Language choice affects AI results, but the answer is not as simple as “use English.” LLMs are often shaped by English-language data and may make key semantic decisions in English-like internal representation spaces, which can give English an advantage in technical, business, academic, and global domains. But non-native speakers can weaken their own results when they force complex ideas into simplified English. For international teams, the best approach is to separate the language of intent from the language of output. Users should prompt in the language that best captures the problem, use English when the domain or audience requires it, and ask for adaptation rather than a literal translation when moving across languages. The real issue is quality control: AI can produce fluent answers in many languages, but fluency does not guarantee that meaning survives.