Did you know American Sign Language is commonly said to be the fourth most-used language in the United States? While it is difficult to know exactly how many ASL speakers there are in the U.S., the estimation ranges from 500,000 to 2,000,000 speakers.
What many people do not realize is that there is not a single, universal dialect or version of sign language. Just as languages vary between countries and regions, so does sign language. In fact, more than 100 types of sign language exist!