Macaronic songs and verse are especially common in cultures with widespread bilingualism or language contact, such as Ireland before the middle of the nineteenth century.

According to Wiki macaronic traditional songs, such as Siúil A Rúin are quite common in Ireland but - despite the ref to the "Wild Geese" or Irish Brigade -

'the reference to the spinning wheel the girl wants to sell is more suggestive of the 19th than of the 17th century, and it is possible that the song was composed in the 1800s with the conscious intention of styling it after older songs.

Amnyways, that's 'traditional enough for me :)