French speakers of English.

I know what you mean. The French seems to have the strongest accents and they keep them so long. It was said about Maurice Chevalier, that after some years he had to take lessons to keep up his accent. One of the worst offenders is Jacques Pepin, who is a great chef whom I watch on TV whenever possible to learn some of his techniques, of which he is a past master, but it's hard to make out what he's saying a good bit of the time, and he's been in the US at least 30 years. His show with Julia Child is a scream. She knows French very well, being a graduate of the Cordon Bleu, but she has an atrocious accent; she calls him "Jack".