Ich Spreche kein Deutsch Use 'kien' for anything you could express as a quantity. If you are speaking of something that can only be expressed as a quality (rather than quantity), then use 'nicht'. "Das Auto ist nicht rot." In this case "I speak no German." In English we could say "I do not speak German." and be correct. However, German requires a definite separation in the use of 'kein' and 'nicht'

I don't think there's any difference. BTW, I usually say: Ich kann kein Deutsch. Deutsch kann ich nicht.