Original: Some North Germanic words also entered English because of the Danish invasion shortly before then (see Danelaw); these include words such as "sky", "window", "egg", and even "they" (and its forms) and "are" (the present plural form of "to be").
Simplified: The word "English" was then and that comes from the name of the Angles - Englas. Those words came to English also, for example, photography ("photo-" means "light" "and "-graph" means "picture" or "writing", in Greek. There is a difference between some spellings in America and the United Kingdom, sometimes called "American English" and "British English". For example "color" is spelled "colour" in the UK.