Foreign words or phrases which are now part of the English language.

Deja vu (seen before)
Mayday/ M'aide( Help me)

60% almost all words over 5 letters in length
That includes the French words they had loaned from Germanic languages to start with which accounts for around 10% of that language. What makes it even more confusing is that loads of these 'Germanic' loan words had Latin origins to start with.
Work with a Greek lad and pretty much everyone calls each other Malaka at work since he's started. He also claims (correctly) that loads of English words come from the Greek language.
He's sound as a pound but he says most Greeks are crazy as bat shit