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Exactly.

In Brazil we do have a rolled r sound. Strangely it is pronounced when two rr's are present in a word, or when the single r is at the end of a word. Cargueiro = Tanker/Transporter.

I...

I think just English speakers in general. Latin derived languages usually tend to have no trouble (portuguese, spanish, catalan, italian, french) as the rolled R is usually present in the language.
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