My dad told me that well into high school that he and his Italian friends would frequently lapse into Italian in their conversations even on the football practice field. In fact, my older sister told me that my older brother would speak Italian with his friends (even though she didn't) when they were loafing on the corner (though it was broken Italian). She was amused at how they would string together a number of Italian words to make a sentence and then end it with a noun in English because they didn't know the Italian word for it.