If you want to say in German, "I speak a little German", you would say,
Ich spreche ein wenig Deutsch.
The phrase "ein wenig" is reminiscent of the English phrase "a little", but what is interesting about "ein wenig" is that it is not an adverb proper. It belongs to a different class called an adverbial.
How would you classify the English phrase "a little"? Is it also an adverbial? And how would you classify the word "little" (in this usage) on its own? It does not seem to be an adverb here.