When Ron and Katherine returned from Missouri and Illinois last week, Katherine noted that the friendly highway patrolman who stopped them in St Louis had a funny accent. It began a conversation about accents and how we must sound to other people. I grew up all over the USA and have been told it is hard to detect from my "accent" where I am actually from. That makes sense as I feel like I have collected words, phrases, pronunciations, etc. from all over the map. However...I pronounce Missouri Missour-ee, not "ah", just like the sign says.
Language is fascinating.Using it to build and lift is much more important that worrying about an accent.