^^ Somewhat, but not quite. Due to the Muslim occupation of the Iberian peninsula (Spain & Portugal), both Spanish and Portuguese have quite a bit of Arabic borrowings. Italian tries much harder to use Latin borrowings, such as adjectives, adverbs and so on.
@W.D.
So you call roughly 1/2 of the American population in Texas, New York, Florida, California, Louisiana (Creole/French), New Mexico, Arizona, Hawaii (Hawaiian), et al "linguistically isolated"? Who's being the redneck conservative now?
Out of Washington state's 5.5 million population, over 770 thousand speak a language other than English at home. Languages are all around us, and it doesn't take force-feeding of dual-language television/newspapers/etc to realize that.