Expired50% confidenceFactExact time
English-language data accounts for the highest proportion in most large language models, typically exceeding 50%, so writing prompts in English may yield better results on certain complex tasks.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/2/2026
First Seen
Valid until: 9/30/2026(expired)
Sources
Core Methodology of Prompt Engineering: A Systematic Deep Dive from Principles to Practice
bilibili大模型研究所5/27/2026
Related Claims
UnverifiedEnglish content in mainstream large language model training corpora typically exceeds 50%, leading to significant performance gaps for non-English languages.85% similarUnverifiedEnglish content typically accounts for 60%–80% of the training data in mainstream large language models.76% similarUnverifiedEnglish data accounts for an overwhelming proportion of mainstream large language model training corpora; taking public datasets such as Common Crawl as an example, English content typically constitutes 40%–60% of the total, while languages such as Vietnamese and Chinese often account for less than 5%.74% similarUnverifiedIn general-purpose corpora such as Common Crawl, English typically accounts for more than 45%, while Portuguese accounts for less than 2%.71% similar
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