Language widely spoken in Newfoundland, c 1700-1820 (5)

I believe the answer is:

irish

(Other definitions for irish that I've seen before include "Nationality" , "Hi, Sir, ar you a Celt?" , "Relating to Ireland" , "Reddish-brown dog" , "Gaelic language" .)

I've seen this clue in The Sunday Times and The Times.

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