How long ago did you check your rego?
There are no local rules it seems
The rules are "
if you mispronounce it as lay-go then we will give you a pass if you have the excuse of having been raised in South Oz".
It's interesting watching local idioms, and reactions to them.
You can tell from this thread that, probably because it's not really a normal topic of physical discussion, there are a bunch of people from SA who're surprised anyone wouldn't pronounce it as "laygo", and the rest of us who've not discussed LEGO with South Australians haven't even heard of the "largo" pronunciation (and still won't rail against that as hard as we do against Americans and their "Lego
s").
I guess here we're used to accents not varying as much as elsewhere ... then when you go elsewhere the accents that can vary in such small distances are weird! It takes someone with a fairly well-attuned ear to hear the difference between an eastern Sydney accent and an Adelaide accent, though they do exist ... and yet in the lunch room in my Belgian HQ where everyone was speaking Flemish (and I don't) you could hear the English accent while speaking Flemish of the people who grew-up on the English Channel ... all of 60km away.
Some thing do spread due to Reasons. Take the word bogan ... that didn't exist in NSW or Queensland prior to the 80's, it was very much a Victorian and maybe even Melbourne thing. I'm pretty sure the word was spread due to the success of Melbourne-based comedy TV starting in the early 80's, think of a popular comedy TV show from the 80's (or even a popular Saturday-morning and then Saturday night variety/entertainment show which featured numerous comedians) and it generally came out of Melbourne.
Comedians are definitely where I first heard the word ... they were Westies in Sydney before the likes of Fast Forward, Comedy Company, D-Generation, etc.
"Stop calling it lay-go!!!" (with perfect English grammar & diction)