I sit near a guy at work who's a friggin genius.  He's literally incredibly smart and could literally be considered a rocket scientist because of the nature of his work. 

But he has one very major flaw:  He uses the word "somewheres" instead of the correct word "somewhere". 

Linguists politely say "somewheres" is a nonstandard or "common" form of the word.  I say it's wrong.  It's completely and utterly wrong, and yes, it makes you sound dumb. 

The thing is, I hardly know anyone who uses this word.  There was my 3rd and 4th grade little league coach, but that was the least of his problems.  My 4th grade football coach might've also used the word (uh oh ... am I seeing a parallel between sports and stupidity?), but again, that wasn't his greatest fault.  Intelligent and uneducated people alike generally don't use the word "somewheres". 

The other thing is that this smart guy uses this word probably 60 to 70 times a day.  "That paper is around here somewheres."  "You take a right somewheres around the bend in the road."  "My son goes to school somewheres near New York."  If I counted the number of times I say the word "somewhere", it would be around 4 or 5 times a week.  Maybe.  This guy not only says the wrong word, he says it a lot.  It's irritating to say the least, especially for a nerd like me.