Does language used in prompt matter?

Should the prompt be in the language in which context is provided or in which user will most likely ask the question?

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Hi, from my one-year-long experience I could say that English is best for most general topics.However, if you want to ask about a significant regional fact, local language is better. Besides, you can prompt in English, helping with another language if you cannot find the most suitable word in English.
This works with me perfectly.

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English works best, but it’s always capable to understand different languages.

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Can you be more specific?

A more specific question will make it easier to provide an accurate answer.

The original question in this topic was whether prompts should be written in the language in which the context is provided, or in the language in which users are most likely to ask their questions.

Each language has unique concepts and expressions, many of which do not exist in other languages, and the reverse is also true.

If the goal is to write prompts that the model will easily follow, then in the past, English—being the language most represented in datasets—was generally the easiest for language models (LLMs) to interpret. Thus, prompts written in English tended to result in instructions that LLMs would follow most faithfully.

However, as of now—particularly regarding OpenAI’s models, though this may not apply to all languages—the gap in interpretation ability between English and other languages has been narrowing. So I’m not entirely sure that writing in English is the best choice anymore.

In summary, if I consider language-specific culture, customs, or concepts important, I find that writing the prompt in that language is ideal. For general topics shared across languages, I believe that English remains the most practical and cost-effective choice.

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