When I was six I moved from Manchester (northwestern England) to Bath (southwestern England). I was baffled to hear my school mates describe the 'aerials' they lived in.
Fast forward many years and I live in Bristol (10 miles from Bath). I find now that sometimes I add 'L's to words ending in vowel sounds, involuntarily! Because that's how Bristolians (and Bathonians) speak (although they didn't always - the city name, originally was Brycgstow (https://en.wikipedia.org/wiki/History_of_Bristol)).
I'm wondering whether anywhere else routinely adds an 'L', or any other letter for that matter, to words ending with a vowel sound.