What is ASL?: A Comprehensive Guide to American Sign Language

American Sign Language, or ASL, is a rich and expressive language. It is hard to pinpoint the exact number of ASL users, but current estimates vary from 500,000 to 2 million people in the US. While many people have seen ASL in classrooms, online videos or on television, not many people actually understand what ASL is, how it works and why it matters. This guide breaks it down. From the history of ASL to its cultural importance and how you can learn ASL for yourself, we delve into everything you need to know.

Whether you’re curious about sign language, interested in accessibility or considering learning ASL yourself, this comprehensive guide will give you a strong foundation of knowledge to build upon.

• What is ASL?
• The History of ASL
• How ASL Works: Key Linguistic Features
• Is ASL the Same as Other Sign Languages?
• Who Uses ASL and Why It Matters
• How to Learn ASL
• Common Myths About ASL
• What ASL Could Look Like in the Future
• How Signapse Supports ASL Users

What is ASL?

ASL is a complete, natural language that uses hand movements, facial expressions and body language to communicate meaning. It is not a visual version of English, or simply English “signed”. ASL has its own grammar, syntax and rules that differ significantly from spoken English.

ASL is primarily used by members of the Deaf community, as well as interpreters, family members of Deaf individuals and hearing people who choose to learn it. Like spoken languages, ASL has evolved over time and reflects the culture and identity of its users.

Importantly, ASL is recognised by linguists as a fully developed language. This means it is just as complex and expressive as any spoken language.

The History of ASL

The history of sign language in America begins in the early 19th century. Before ASL existed in its modern form, Deaf communities in the US used a variety of regional sign systems. One of the most influential was Martha’s Vineyard Sign Language, used by both Deaf and hearing residents of the island to communicate. Towns on this island accepted Deaf individuals for who they were and it was seen as a normal part of life.

Who Invented ASL?

ASL truly began to take shape in 1817, when Thomas Gallaudet, an American educator, travelled to Europe to learn teaching methods for Deaf students. He initially intended to learn from the Braidwoods, but they wanted to keep their teaching methods secret, leading him to meet Laurent Clerc, a Deaf French educator. Gallaudet returned to the US with Laurent Clerc and together they founded the American School for the Deaf in Hartford, Connecticut.

ASL emerged from a blend of French Sign Language (LSF) and existing local sign systems in the US. Over time, it developed into a distinct language with its own structure and vocabulary.

For many years, ASL was wrongly dismissed as inferior to spoken languages. It wasn’t until the 1960s that linguist William Stokoe demonstrated that ASL has a legitimate linguistic structure. His research helped establish ASL as a recognised language and marked a major turning point in Deaf education and advocacy.

How ASL Works: Key Linguistic Features

ASL is a visual-spatial language, meaning it relies on sight rather than sound. Communication happens through a combination of manual and non-manual elements.

Handshapes, Movement and Location

Every ASL sign is built using several components:

• Handshape - the shape your hand makes
• Movement - how your hand moves
• Location - where the sign is made in relation to your body
• Palm Orientation - which way your palm faces

Changing just one of these elements can change a sign’s meaning entirely, similar to how changing a sound in a spoken word can alter its meaning.

Facial Expressions and Non-Manual Markers

Facial expressions are not optional in ASL. They are grammatically essential. Raised eyebrows, head tilts, eye gaze, and mouth movements all convey information such as:

• Whether a sentence is a question
• Emotional tone
• Emphasis or intensity

For example, yes/no questions are typically accompanied by raised eyebrows, while “wh-questions” (who, what where, why) use lowered eyebrows.

ASL Grammar and Sentence Structure

ASL grammar differs slightly from English grammar. Rather than following a strict Subject-Verb-Object order, ASL often uses a Topic-Comment structure. Time indicators, such as “yesterday” or “next week”, usually come at the beginning of a sentence.

ASL also does not rely on articles like the or a, and verbs are not conjugated in the same way as in English. Context and spatial referencing play a much larger role in conveying meaning.

Is ASL the Same as Other Sign Languages?

Although a common myth, ASL is not universal. Just as spoken languages differ around the world, sign languages also vary by region and culture. British Sign Language (BSL), for example, is completely different from ASL, even though both countries primarily speak English. In fact, ASL shares more similarities with French Sign Language (LSF) than with BSL due to its historical roots!

With over 300 sign languages across the globe, sign language is not a one-size-fits-all, but rather a range of different cultures.

Who Uses ASL and Why It Matters

ASL plays a central role in Deaf culture, which views deafness not as a disability, but as a unique cultural and linguistic identity. For many Deaf individuals, ASL is their native language and their primary way of connecting with their community.

Beyond personal communication, ASL is used in:

• Education and universities
• Healthcare and mental health services
• Legal settings
• Television, social media and live events

ASL improves accessibility, promotes inclusion and helps bridge communication gaps between Deaf and hearing communities. Its growing visibility reflects broader efforts toward equity and representation.

How to Learn ASL

There are many ways to begin learning ASL, depending on your goals and learning style.

Popular options include:

• Online ASL courses and learning apps
• Community college or university classes
• Private tutors or small group lessons
• Deaf community events and immersion experiences

One of the most important aspects of learning ASL is engaging with native or fluent signers, especially Deaf instructors. This can help learners develop accurate signing, understand cultural norms and improve comprehension.

Top Tip: For beginners, consistency matters more than speed. Practicing regularly, watching signed content and focusing on understanding rather than memorisation will lead to stronger long-term progress!

Common Myths About ASL

There are several persistent misconceptions about ASL. Let’s debunk them!

1. ASL is just English with hand movements.

False. ASL has its own grammar and structure making it its own language. The US does not recognise any spoken or signed language as official languages but many states do recognise ASL as a language in state law.

2. ASL is the same everywhere.

False. Sign language differs by region, much like spoken language can vary from state to state. You can think of it like regional slang. Different areas use different signs for the same word, and there are often multiple acceptable ways to sign certain terms.

3. Only Deaf people need ASL.

False. Many hearing people also learn ASL to communicate with family members, work colleagues or out of personal interest.

Understanding the truth behind ASL helps promote respect for ASL as a legitimate language!

What ASL Could Look Like in the Future

As technology advances, the awareness of ASL and the culture tied to it is sure to gain visibility. New tools are emerging that expand how, where and by whom the language is used. We’re already starting to see this happen in real-time. AI technology, like ours at Signapse, is transforming the way sign language can be integrated into every day life.

A prime example is the introduction of sign language translated travel information at Cincinnati/Northern Kentucky International Airport (CVG). This sign language translated information ensures Deaf travellers have the same access to crucial information as hearing travellers.

But this is just beginning! From the creation of digital signers to accessible content being a requirement, ASL will inevitably be commonly seen in public spaces in the near future.

How Signapse Supports ASL Users

At Signapse, we’re all about improving accessibility with the use of AI Sign Language Technology. We now offer both BSL and ASL AI translation so you can translate your content in your preferred sign language with the click of a button.

Why not try out our technology for yourself with the free SignStream tool to translate your content into BSL instantly?

Interested in AI ASL? Book a demo with our team today to see our sign language translation tools in action.

FAQs

Who invented ASL as a sign language?

ASL was developed in the early 1800s through the combined influence of French Sign Language and the signing systems already used by Deaf communities in the US. Thomas Hopkins Gallaudet and the Laurent Clerc played key roles in establishing and spreading it through Deaf education.

How is ASL different from English?

ASL has its own grammar, sentence structure and rules that are separate from English. It uses handshapes, facial expressions and body movements to convey meaning rather than spoken or written words.

What language is ASL closest to?

ASL is most closely related to French Sign Language (LSF). This is because early American Deaf education was heavily influenced by French teachers and methods.

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