How Does "English (US)" Become the Default? Triangulating Structural Bias Towards American English Across the LLM Pipeline

A study examining how "English (US)" becomes the default English setting across the large language model pipeline finds that widely used LLM platforms expose American English as a primary English option despite the global diversity of English. The research triangulates structural bias toward American English across the LLM pipeline, asking how that default is established as LLMs are increasingly embedded in educational, professional, and public infrastructure.

Large language models LLMs are increasingly embedded in educational, professional, and public infrastructure, yet widely used platforms expose "English US " as a primary English setting despite the global diversity of English. We ask: How does "English US " become the default? We study this ques