When we talk about accessibility, we often talk as though humans only recently started adapting communication for different people.
Captions.
Interpreters.
Screen readers.
AAC devices.
Text-to-speech.
Alternative communication.
We tend to place these things inside a very modern disability framework.
But humans have been adapting communication across differences for a very long time.
One fascinating example is Plains Indian Sign Language, sometimes called Plains Sign Language or Hand Talk.
Its history complicates the assumption that spoken language has always been the natural default and everything else is an accommodation.
The Great Plains were linguistically diverse
The Indigenous nations of the Great Plains did not all speak the same language.
Far from it.
The region contained enormous linguistic diversity.
People traveled.
Traded.
Formed alliances.
Negotiated.
Shared stories.
Held ceremonies.
And interacted across spoken-language boundaries.
Communication between people who did not share the same spoken language required adaptation.
Over time, a sophisticated signed language was used across a broad geographic area.
The Smithsonian describes Plains Indian Sign Language as a language that helped communication across spoken-language barriers among Native nations of the Great Plains and surrounding areas.
It was used for far more than basic trade.
It could be used for conversation, storytelling, ceremonies, legends, prayers, and complex narratives.
This was a language, not random gestures
That distinction is important.
When people hear about a historical "sign language," they may imagine a collection of improvised gestures.
Pointing.
Miming.
Acting something out until another person understands.
Plains Indian Sign Language was much more sophisticated.
It had linguistic structure and could communicate complex ideas.
People could use it across spoken-language differences in situations where verbal communication would otherwise be difficult.
Historical researchers documented Plains sign systems by the early twentieth century, including records now preserved by the Smithsonian's National Anthropological Archives. A 1915 collection, for example, contains notes examining the history and theory of sign language among Plains Indians.
But the language itself long predates those outside efforts to document it.
The fact that researchers eventually wrote something down is not the beginning of that history.
And Deaf Indigenous people used it too
This is where the story intersects directly with disability history.
Plains Indian Sign Language was not created solely as a disability accommodation.
It developed in a multilingual environment where signed communication could bridge spoken-language differences.
But Deaf Indigenous people also used signed language.
The Smithsonian describes Plains Indian Sign Language as having served, and continuing to serve, as a primary language for some Deaf Native people.
Think about what that means.
A communication system useful across entire communities could also provide Deaf people with a way to participate in those communities.
The line between "accessibility" and simply "the way people communicate" becomes much less clear.
And maybe that's worth paying attention to.
Accessibility doesn't always have to look like an accommodation
Modern disability systems often work like this:
First we create the standard way of doing something.
Then someone can't access it.
Then we add an accommodation.
A meeting happens verbally.
Then someone requests captions.
Information is printed.
Then someone requests an accessible digital version.
An event requires standing.
Then someone requests seating.
A classroom expects spoken communication.
Then someone requests AAC.
The disabled person becomes the exception to the original design.
But what happens when multiple forms of communication are already normal?
The entire dynamic changes.
Instead of asking:
Why does this person need a different way to communicate?
we can ask:
Why did we decide there should only be one acceptable way in the first place?
Human communication has always been flexible
Speech is communication.
Signing is communication.
Writing is communication.
Typing is communication.
AAC is communication.
Gesture is communication.
Facial expression is communication.
Visual symbols are communication.
Human beings have always found multiple ways to transfer information between one another.
Yet modern institutions frequently organize themselves around one preferred form.
Schools may expect speech.
Healthcare settings may rely almost entirely on verbal communication.
Workplaces may assume someone can process information immediately during a spoken meeting.
Public announcements may be available only through sound.
Online information may technically exist while remaining inaccessible to screen readers.
Then when someone cannot use the preferred method, we describe the person as having a communication deficit.
Disability history asks us to consider the environment too.
Maybe the communication system is creating the barrier.
Colonization disrupted language
There is another part of this history that cannot be ignored.
Colonization did enormous damage to Indigenous languages.
For generations, federal assimilation policies attempted to replace Indigenous languages and cultures with English-speaking Christian American culture.
Boarding schools separated Native children from their families and communities.
Children were often prohibited or punished for speaking their own languages.
Those policies did more than change what individual children spoke.
Language lives between people.
It carries stories.
Relationships.
Humor.
Ceremony.
Knowledge.
Ways of describing the natural world.
Ways of understanding community.
And ways of communicating that may not translate neatly into another language.
When generations are prevented from passing a language forward, the effects can continue long after the original policy ends.
Plains Indian Sign Language is now considered endangered, although it continues to be used in traditional storytelling, ceremonies, conversation, and within some Deaf Indigenous communities.
Communication access is disability access
When we talk about accessible spaces, physical access gets a lot of attention.
And physical access matters enormously.
But getting into the room is only the first part.
Once you're there:
Can you understand what is happening?
Can you express yourself?
Can other people understand you?
Can you participate without being forced to communicate in a way that does not work for your body or brain?
Those questions matter to many Deaf and hard-of-hearing people.
Autistic people.
People with speech disabilities.
People with intellectual and developmental disabilities.
People with brain injuries.
People who use AAC.
People with auditory processing differences.
People dealing with cognitive fatigue or brain fog.
And many others.
Communication barriers are access barriers.
What counts as "normal" communication?
This history leaves me with a question I keep coming back to.
What counts as normal communication?
And who decided?
If two people communicate successfully with their hands, is that somehow less legitimate than speech?
If someone types instead of speaking?
Uses an AAC device?
Needs written instructions?
Uses captions even though they technically hear?
Needs extra processing time before responding?
Communicates differently when they're overwhelmed or exhausted?
The goal of communication should not be making every human body and nervous system communicate through the exact same channel.
The goal is understanding one another.
That sounds obvious.
But our institutions still struggle with it.
Accessibility is part of a much older human story
I don't want to take Plains Indian Sign Language and reduce it to a modern disability-awareness lesson.
It belongs first to the Indigenous peoples, communities, and cultures through which it developed and continues.
Its history is richer than any single lesson about accessibility.
But it can still challenge something about the way we think.
Communication difference is not new.
Communication adaptation is not new.
Humans finding ways to connect across bodily, linguistic, cultural, and geographic differences is not new.
We have been doing that for a very long time.
Maybe accessibility isn't as unusual as our systems sometimes make it seem.
Maybe adaptation isn't evidence that something went wrong.
Maybe it is one of the most ordinary things human beings do.
For more disability history, Indigenous history, and the places where those stories intersect, follow along with the blog or join my newsletter for the deeper research behind the Reels.