How Many Sign Languages Are There? I Used to Think There Was Only One

2026년 6월 25일

I Thought Sign Language Was Universal
Wait, ASL Isn't Used Everywhere?
So How Many Sign Languages Are There?
Why Different Countries Developed Different Sign Languages
The Surprising Relationship Between ASL and French Sign Language
Sign Language in Different Countries
Can People Who Use Different Sign Languages Understand Each Other?
What Is International Sign?
Why Sign Languages Keep Changing
FAQ

How Many Sign Languages Are There? I Used to Think There Was Only One

A few years ago, if someone had asked me how many sign languages existed, I probably would have said:

"One."

Not because I knew anything about sign language.

Just because it seemed logical.

I assumed sign language worked like a universal visual system. People in different countries might speak different languages, but surely they all signed the same way.

Then I started learning a little about American Sign Language.

That's when I discovered something that completely surprised me.

People in the United Kingdom don't use ASL.

At first, I thought that couldn't be right.

Americans speak English.

Brits speak English.

Why wouldn't they use the same sign language?

But that's not how sign languages work.

The deeper I looked, the more fascinating it became. I learned that there are hundreds of different kinds of sign language used around the world, each with its own history, grammar, vocabulary, and culture.

If you've ever wondered:

How many sign languages are there?
Are there different sign languages?
Is sign language the same in all languages?
How many different types of sign language are there?

you're definitely not alone.

Wait, ASL Isn't Used Everywhere?

This was honestly the biggest surprise for me.

Many people assume American Sign Language is used internationally.

After all, it's one of the most visible sign languages online.

ASL videos are everywhere.

ASL classes are widely available.

ASL content creators have huge audiences.

But ASL is primarily used in the United States and parts of Canada.

Outside North America, people often use completely different sign languages.

For example:

The United Kingdom uses British Sign Language (BSL)
Australia uses Auslan
Japan uses Japanese Sign Language (JSL)
France uses French Sign Language (LSF)

These aren't just different accents.

They're different languages.

That's why questions like "is sign language the same in every language" have a simple answer:

No.

Not at all.

So How Many Sign Languages Are There?

The short answer?

More than most people think.

Researchers generally recognize more than 300 sign languages worldwide.

That's why searches like:

how many sign languages are there
how many sign languages are there in the world
number of sign languages
how many versions of sign language are there

don't have a small answer.

We're not talking about ten or twenty languages.

We're talking about hundreds.

The exact number changes over time because linguists continue documenting regional and community sign languages that previously received little attention.

In some cases, researchers even debate whether a signing system should be classified as its own language.

But regardless of the exact figure, one thing is clear:

There are far more varieties of sign language than most people realize.

Why Different Countries Developed Different Sign Languages

Once I learned there were hundreds of sign languages, my next question was obvious:

Why?

Why didn't one universal sign language develop?

The answer is actually similar to spoken languages.

Communities developed separately.

Schools for Deaf students opened in different countries.

Local culture influenced communication.

Over generations, those communities created their own languages.

Just like English, Spanish, Japanese, and Arabic developed independently, sign languages evolved independently too.

That's why sign language in different countries often has different:

Vocabulary
Grammar
Sentence structure
Fingerspelling systems
Cultural expressions

Sign languages are real languages, not visual versions of spoken languages.

That distinction is important.

The Surprising Relationship Between ASL and French Sign Language

Here's another fact that surprised me.

Most people assume ASL would be closely related to British Sign Language because both countries primarily speak English.

But that's not true.

Historically, ASL was heavily influenced by French Sign Language.

In other words, ASL actually shares more similarities with French Sign Language than with British Sign Language.

The first time I learned this, I had to double-check because it seemed backward.

But language history often works that way.

Languages don't always follow national borders.

The same is true when studying sign language language family relationships.

Some sign languages share common roots, while others developed independently.

Sign Language in Different Countries

One of my favorite things about learning sign language is discovering how much diversity exists around the world.

When people ask about sign language worldwide, they often imagine one system used everywhere.

The reality is much more interesting.

United States

American Sign Language (ASL) is widely used and has its own grammar and linguistic structure.

United Kingdom

British Sign Language (BSL) is a separate language with significant differences from ASL.

Australia

Auslan shares historical connections with BSL.

Japan

Japanese Sign Language developed within Japanese Deaf communities and reflects local cultural influences.

France

French Sign Language played a major role in shaping several modern sign languages, including ASL.

These examples show why sign language in different languages is such an important concept.

Each language reflects the community that created it.

Can People Who Use Different Sign Languages Understand Each Other?

Sometimes.

But not always.

Imagine an English speaker meeting someone who speaks Italian.

They may recognize a few words, but full communication isn't guaranteed.

The same idea applies to many different forms of sign language.

Some sign languages share historical roots.

Others do not.

A signer who uses ASL may recognize a few familiar signs when watching another sign language, but understanding an entire conversation can be difficult.

Experienced signers often rely on:

Gestures
Context
Shared visual clues
International Sign

to communicate across language barriers.

But fluency in one sign language doesn't automatically mean fluency in another.

What Is International Sign?

At this point, people usually ask:

"If there are hundreds of sign languages, how do signers communicate internationally?"

That's where International Sign comes in.

International Sign isn't exactly a native language.

Instead, it's more like a flexible communication system used at:

International conferences
Global Deaf events
International sports competitions
Cultural gatherings

Think of it as a bridge.

It helps people from different signing backgrounds communicate, even if they don't share the same language.

It's not perfect, but it can be incredibly effective.

Why Sign Languages Keep Changing

One thing I've learned while researching sign language is that no language stands still.

Not spoken languages.

Not sign languages.

Technology creates new vocabulary.

Social media changes communication habits.

Communities develop new expressions.

That's one reason the different types sign language continue evolving.

The sign language used today isn't exactly the same as the sign language used fifty years ago.

Languages grow because people grow.

Final Thoughts

When I first started learning about sign language, I honestly thought there was just one.

Now I know that sign language is every bit as diverse as spoken language.

So, how many different sign languages are there?

Current estimates suggest more than 300.

That means there are hundreds of different kinds of sign language, each shaped by its own history, culture, and community.

And for me, that's one of the most fascinating things about sign language.

The more you learn, the more you realize how much there is to discover.

FAQ