"Auld Lang Syne" Heresy

[OC Richard]

Similarly when you hear someone pronounce a word such as "pattern" as "pattren" this again is correct in Scots.

Very interesting! This is called metathesis and crops up all the time in the history of English.

An example is the African-American pronunciation of "ask" as "aks/ax". The African-American pronunciation is not Standard English, but it is not at all a recent American innovation but is actually long-established in England itself:

And one of theym named Sheffelde, a mercer, cam in-to a hows and axed for mete; and specyally he axyed after eggys. And the goode wyf answerde, that she coude speke no frenshe. And the marchaunt was angry, for he also coude speke no frenshe, but wolde have hadde egges, and she understode hym not. And thenne at laste a nother sayd that he wolde have eyren. Then the good wyf sayd that she understod hym wel.

William Caxton c1476

(The letter g changed to y at some point, apparently by the time that Angles, Saxons, and Jutes brought their language to England. Then the large Old Norse-speaking settlement in the north east (the Danelaw) introduced Norse words which were similar to the English words but had retained the G. So yard/garden, eyren/eggs, yat/gate, etc.)

Another example of metathesis is "bird", which was originally "brid".

Many Americans pronounce "pretty" as "purdy". Etc etc.