In French you speak a little French?

I can speak a little French.

Je parle un peu français. -- "zhuh parl eh[n] puh frah[n]-seh"

([n] is an indication to nasalize the preceding vowel.)

I undestand a bit of French.

Je comprends un peu le français. -- "zhuh com-phon eh[n] puh ler frah[n]-seh"