In the southwest they sometimes use vinegar and herbs and in Hesse (central DE) they have Grie Soß (which no-one understands).
Sadly those differences are fading due to TV propaganda.
German actually has more freedom in word order within a sentence.
Ich gehen nachher noch zum Laden.
Nachher gehe ich noch zum Laden.
Zum Laden gehe ich nachher noch.
Zum Laden gehe ich noch nachher.
And slang, like every language has slang. "Kommst du Fußball?" Some people will sneer at it, some use it every day. Or the shortening of word endings (neben ->nem')(kannst du -> kannste)
This leads to another problem. Everyone will make policy to suck up to industry in order to secure a job after their term limits.
It's already a problem of politicians swapping in and out of politics and into industry. Today they "represent the people against car manufacturers", tomorrow they are a car industry lobbyist.
Is this your oc? I would totally wear a t-shirt like that