There are native-English dialect groups which make no distinction between the vowels in 'pin' and 'pen'. For all I rib my wife about falling on the other side

There are native-English dialect groups which make no distinction between the vowels in 'pin' and 'pen'. For all I rib my wife about falling on the other side of that line, it took my American ear a long time to hear UK-dialect(s) distinctions between 'Mary', 'merry', and 'marry', and still a fair bit of concentration to reproduce them!