A quick, direct answer, followed by what actually goes into learning ASL well.
No. As of 2026, Duolingo does not offer an American Sign Language course. Its catalog covers 40+ spoken and written languages, but ASL isn't one of them.
Most language apps, Duolingo included, are built around a format that assumes a spoken and written language: type a translation, listen to audio, speak into a microphone for pronunciation scoring. American Sign Language doesn't work that way. ASL is a visual-spatial language — meaning is carried through handshape, hand movement, location relative to the body, palm orientation, and facial grammar (eyebrow position, mouth shape, and head tilt all carry linguistic meaning, not just emotion). There's no spoken component to score with a microphone and no standard written form the way English or Spanish have. Teaching it well requires video demonstration and visual recognition exercises, not audio-based drills, which is a meaningfully different product to build than a typical spoken-language course.
Effective ASL instruction generally combines several things: clear video of signs performed by fluent signers (ideally from multiple angles, since handshape and movement matter), repetition and recognition practice so a learner can identify a sign and its variations, vocabulary organized around real situations (greetings, family, numbers, everyday objects), and gradually, exposure to facial grammar and sentence structure, since ASL grammar doesn't map word-for-word onto English. Because there's no audio to lean on, visual memory and repetition carry more of the learning load than they would in a spoken-language course — which is part of why so few mainstream apps have built a full ASL course despite demand for one.
As with most languages, reaching real fluency in ASL benefits from interacting with fluent signers and Deaf community members over time — an app is a strong way to build a starting vocabulary and get comfortable with basic structure, not typically a full substitute for that kind of immersion.
Lumi Lingo includes ASL alongside Spanish and French. Because Lumi Lingo's entire format is built around visual recognition and tap/type answers rather than speaking into a microphone, ASL fits the underlying design naturally rather than needing a separate exercise type bolted on — the app was never built around audio input in the first place, since answer choices are read aloud and the learner responds by tapping or typing regardless of which of the three languages they're learning. Learners can self-select their starting level or take a real placement quiz, and progress is tracked per learner, with printable progress reports available. The tradeoff to be upfront about: Lumi Lingo is a newer product (2026) with one ASL course, not a large catalog, so it's a starting point for ASL rather than a claim to be the definitive or most comprehensive ASL resource available.
Spanish, French, and ASL. No microphone required, ever. Free 72-hour trial.
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