Answer:
I believe so, let's use a sociological example...take the United States for instance. The language in many areas tends to be slurred or slang, text lingo, in other words. Through constant use of shortened words and phrases we can actually "dumb" down our brains; our thought pattern will become much more limited. Speech in other areas of the world- China, Russia- the language is much more complete. Having many more characters per alphabet and society itself implementing high vocabulary. The thought patterns of these people will tend to be more smart.***
*I am in no way trying to slam American speech or thought, I myself am an American but am also stating facts.