What do you consider speak? I know one phase in each of French and Russian - though I'm sure my accent is so bad natives would have trouble understanding me. I can read Spanish, and produce simple sentences that are not memorized, but I'm not on the level of a conversation. So how many languages do you want to say I speak? You can creditably argue 1,2, or 4 from the above.
Roughly 10% of Americans are hard of hearing. Unfortunately far fewer have learned sign language.
I assume that's because the majority of them are elderly, and have no desire to learn it.