Considering that all new words generally start off as slang, no word really just enters the English language immediately, all words come from different languages. Here is a list of the most common foreign language influences in English, where other languages have influenced or contributed words to English
French words for the meat of an animal, noble words (this comes from the influence of the Norman language), words referring to food - e.g. au gratin. Nearly 30% of English words (in an 80,000 word dictionary) may be of French origin.