Advice on how to not let your husband talk inappropriately at work because I don’t like it one bit and my husband works at a auto body shop ?

If you don't love your husband for who he is, you're marriage is going to struggle a lot. The best thing to do is to tell him, he can say what he wants but he has to respect you. If he talks to his colleagues about you in ways that you find insulting, let him know how much that hurts you. If he doesn't care if he hurts you, then you should probably seek couples counseling.

How about a compromise? He talks however he feels at work, but agrees to watch his language at home? 

People who seek to control others are the lowest of the low.  "I don't like it".  As if the world revolves around you and what you like!    You will not succeed whatever you do but you can build resentment ultimately leading to him escaping you via a well deserved divorce.

Do not even try it. Leave him alone. Do you go to work with him and you hear it? Or are you just trying to control him...you better learn your bounds, before you are his ex wife. Because if it were me, you would already be my ex.

What is inappropriate?

It's one thing to police a partner's behavior when he's with you, although that's still sketchy to most people. But to think you can control him when you're not even around and over something as insignificant as inappropriate talk is a little bizarre. Unless your concern is that his salty talk is going to get him fired this is really outside of your control. 

Obviously, you need to get him "wired". 

This way you can listen in, and even 

maybe administer a little jolt when 

something "inappropriate" is heard. 

I don’t “let” my husband do anything, as I do not control him. I certainly have no control over what he says or does at work. If there is language I find offensive that he is using at home, I can tell him I don’t like or appreciate that language. But at work? I don’t even know what he says or does. Do you have the auto shop bugged?

I advise you make no effort.  Why?  Because that isn't within your power.  You can control yourself, not anyone else.

Unless you plan to follow him to work and stand there every time he tries to speak there is no way to control what another person says. How would you even know what he says at work? are you spying on him? what does he think of your 4 baby daddies you mention in your other troll posts? you realize you left all your troll posts showing right?