As indicated by the hodgepodge of attempted dialects in “House of Gucci,” Nicolas Cage’s strangely nasal intonations in “Captain Corelli’s Mandolin,” and Chris Pratt’s misguided voiceover in “The ...

American Sign Language isn’t a translation of English. It’s a language with its own grammar and idioms. Sign language speakers also have their own accents. Learn how this language, like every other, ...