English,as the most commonly used language,has adapted many foreign vocabularies along its development in the history.Forgein elements in English vocabularies will expand and progress along with the evolving of modern societies.This article aims to study the sources,categories and effects of forgein vocabularies have on the English language. English,as the most commonly used language,has adapted many foreign vocabularies along its development in the history.Forgein elements in English vocabularies will expand and progress along with the evolving of modern societies.This article aims to study the sources,categories and effects of forgein vocabularies have on the English language.