I don't make sense when I talk why?

Whenever I try to talk with people whether is at work or randomly people dont understand me they either say huh? what did you say?

The only time I talk is at work because I have to since I work at grocery.
I'm a loner so dont have friends or people to talk to so i don't talk at home I be on my computer either playing games or watching something, so do you guys think the reason i struggle when I talk is because I only talk when i'm at work?
I don't make sense when I talk why?
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