I'd imagine it has something to do with the phenomenon wehre you can raed the wrdos in a sntecnee eevn if tehy are jmlbued up. Plus being drunk would magnify the chance to mistake BERLIN for DUBLIN. The last halves of the words arethe same, and so do B and D as well as B and R if you squint.
shrugs In Spanish the accent for both Berlin and Dublin is in the last silabe, so it sounds a bit more similar than in English. This plus being naive, young and careless, I suppose... :D