After visiting the beach we used to enjoy sitting in the shade outside the bakery a whole lot. My favourite was a smoked salmon sandwich on their lovely fresh bread. Whenever I ordered one, I asked for a smoked "saMMon" sandwich. I was always gently corrected, "You mean a smoked saLmon sandwich." (The soft 'd' in sandwich was left mentioned).
"Ah, of course", I would smile. It became a 'thing' and we still call it saLmon to this day.