Should I reveal to everyone that I have speech-language problems?

Should I reveal to everyone that I have speech-language problems? My family suggests to hide these problems because no one hires me if they knows. Yes, it's true. These employers have candidates who don't have any speech problem and work as well as I do. I never apply for any job that requires oral communication. However, my speech is severely impaired and people can easily spot it as soon as I start saying a first word. I'm very tired for trying to be normal.