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International Sign Languages
A common misconception is that there is one universal sign language used by Deaf people everywhere. In reality, this couldn’t be further from the truth. Across the globe, there are hundreds of distinct signed languages, each with its own grammar, vocabulary, and cultural identity.
Understanding international signed languages matters more than ever in today’s interconnected world. As global travel, communication, and collaboration increase, recognizing linguistic diversity—including within Deaf communities—is essential for inclusion and effective communication.
What Is a Signed Language?
A signed language is a complete, natural language that uses hand movements, facial expressions, and body language to convey meaning instead of spoken words.
These languages develop naturally within Deaf communities, often forming around schools, shared cultural spaces, or social networks. Over time, they evolve just like spoken languages, shaped by history and local culture. Unlike spoken languages, signed languages rely on visual-spatial grammar rather than sound. They are not simply “translated” versions of spoken languages but independent linguistic systems with their own rules and structure.
Is Sign Language Universal?
Sign language is not universal. Just like English, Spanish, and Japanese differ, signed languages vary widely from country to country. For example, the sign for a common word like “thank you” looks different in American Sign Language (ASL) and British Sign Language (BSL), reflecting their separate evolution.
There is no universal sign language used worldwide. Instead, more than 300 distinct signed languages exist, each shaped by its own culture and community. The closest alternative is International Sign, a simplified system used for communication at global events, but it is not a complete or standardized language.
Spotlight on Signed Languages Around the World
American Sign Language (ASL)
ASL is used primarily in the United States and parts of Canada. It developed in the early 19th century and was heavily influenced by French Sign Language (LSF).
It is known for its expressive grammar, use of facial expressions, and one-handed fingerspelling system.
British Sign Language (BSL)
BSL is the primary language of the Deaf community in the United Kingdom. Despite both countries using English, BSL and ASL are completely different languages.
One key feature of BSL is its two-handed alphabet, which distinguishes it from ASL’s one-handed system.
Langue des Signes Française (LSF)
LSF is used in France and is one of the most historically significant sign languages. It played a major role in the development of ASL.
It also holds strong cultural importance within the French Deaf community and has influenced Deaf education worldwide.
Japanese Sign Language (JSL)
JSL is used in Japan and reflects aspects of Japanese culture and communication style. It includes unique features such as the integration of mouth movements with signs.
Like other signed languages, it is a fully developed system with its own grammar and vocabulary.
Auslan (Australian Sign Language)
Auslan is used throughout Australia and is closely related to British Sign Language, sharing similar structures and vocabulary. It is part of the BANZSL family of sign languages, which includes BSL and New Zealand Sign Language.

What Is International Sign?
International Sign is a simplified communication system used in global settings such as conferences, sporting events, and international Deaf gatherings. Its purpose is to bridge communication gaps between people who use different signed languages. However, it has limitations—it lacks the full grammar and nuance of native signed languages.
The Role of Culture in Signed Languages
Culture plays a major role in shaping signed languages. Local customs, values, and social norms influence how signs are formed and used.
Just like spoken languages, signed languages include regional dialects and variations, even within the same country. Understanding these cultural differences is essential when communicating across borders, as it promotes respect and prevents misunderstandings.
Why International Signed Languages Matter
International signed languages play a key role in promoting inclusion on a global scale. They help ensure that Deaf individuals can participate fully in education, travel, and professional environments.
They also support Deaf travelers, students, and professionals by enabling communication across linguistic boundaries. Most importantly, they encourage a deeper appreciation for the diversity and richness of Deaf cultures around the world.
The world of signed languages is incredibly diverse, with over 300 unique languages used by Deaf communities worldwide. By learning about different signed languages and cultures, we can build a more inclusive and understanding global society.
Learn more about ASL and it’s history in America with DSU’s Training Solutions!
Q&A
1. Is there a universal sign language used worldwide?
No, there is no universal sign language. There are more than 300 different signed languages used around the world, each unique to its region and culture.
2. What is the difference between ASL and BSL?
American Sign Language (ASL) and British Sign Language (BSL) are completely separate languages with different grammar, vocabulary, and alphabets. ASL uses a one-handed system, while BSL uses a two-handed alphabet.
3. What is International Sign and when is it used?
International Sign is a simplified communication system used at global events, such as conferences and the Deaflympics, to help people from different signing backgrounds communicate.
4. How do signed languages develop?
Signed languages develop naturally within Deaf communities over time, influenced by local culture, history, and social interaction, similar to how spoken languages evolve.
5. Why is it important to learn about different signed languages?
Learning about different signed languages promotes inclusion, supports global communication, and helps people better understand and respect Deaf cultures around the world.