ASL dictionary Browse thousands of words in the ASL dictionary online. May 2012: There are linguistic and educational benefits of learning both American Sign Language and spoken/written English. Deaf children can acquire two languages ... An interview with Francois Grosjean by Nataly Kelly, Chief Research Offier, Common Sense Advisory. Not only does this site act as a dictionary for ASL, but it teachers baby signing and finger signing too! It also highlights benefits of knowing sign.