What are the stereotypes of the native English speaker's accent as perceived by non-English-speakers?
Example: What does an American or English accent sound like to, say, a French person, when a (somewhat fluent) native-English-speaker speaks French? How about Spanish or Russian or Portuguese, etc? English speakers have stereotyped perceptions of how (just for example) a French accent on top of English sounds to them, but what about the opposite? Harder consonents, more monotonal, other nuances, what?
What characteristically stands out, or is missing, when a native English speaker speaks another language?
What about the stereotypes for English speakers speaking English? Are all Americans John Wayne or Geo W or maybe Ernest
? Are Brits John Cleese, or a voice from the BBC News? Is there more than one American stereotype, like the Southerner vs the New England Yank? And do non-English-speakers differentiate between Scots, English, Irish, Aussies, Canadians, etc?