I mispronounced words all the time and get teased for it. It doesn't bother me because I'm smart. Mispronouncing words doesn't necessarily mean we're not intelligent. It just means we mispronounce words on occasion. The next time someone corrects you and does so politely, just act fascinated and say, "I didn't know I was saying it wrong all this time. Thanks for that." Then, keep the conversation going.