* Proper noun: When referring to the language, "English" is a proper noun, specifically a language name. Proper nouns are always capitalized. For example:
* "I'm learning English."
* "The book is written in English."
* Common noun: When referring to people from England, "English" is a common noun, specifically a nationality. Common nouns are not capitalized unless they are at the beginning of a sentence. For example:
* "The English are known for their politeness."
* "She is an English citizen."
It's important to pay attention to the context to determine which type of noun "English" is acting as.