Good grief! I've just found the lyrics referred to above which I've never heard before:

http://www.ireland-information.com/irishmusic/eringobragh.shtml

The Erin Go Bragh I know is a satire on anti-Irish and anti-Highland prejudice among the Lowland Scots (and the Edinburgh police in particular:

http://www.dickgaughan.co.uk/songs/texts/eringobr.html

I assume the Irish text is a WWII parody of the Scots. Anybody know?