How sign language interpreting became a profession in the United States
Sign language interpreting in the United States developed from community practice into a specialized profession shaped by Deaf leadership, education policy, civil rights law, and technological change. For much of American history, Deaf people relied on family members, teachers, clergy, and trusted community members to interpret conversations, medical appointments, legal proceedings, and public events.
The profession gained structure during the twentieth century as schools for Deaf students expanded, interpreter training became more formal, and Deaf advocates demanded direct access to communication. These changes established interpreting as skilled language work rather than an informal favor or charitable service.
Understanding this history also clarifies why modern interpreting requires cultural knowledge, ethical judgment, fluency, and accountability. The field continues to evolve through Deaf interpreters, remote services, specialized credentials, and stronger expectations for accessibility.
Community roots before professional standards
Long before interpreting organizations existed, Deaf people created communication networks within families, neighborhoods, schools, workplaces, and faith communities. Some hearing relatives became regular interpreters, while others learned enough sign language to support everyday interaction. In many places, Deaf adults also interpreted for one another, especially when a hearing person did not understand the community’s language or cultural expectations.
American Sign Language emerged through several influences, including regional signing systems and French Sign Language introduced by Laurent Clerc. When Clerc joined Thomas Hopkins Gallaudet in founding the American School for the Deaf in 1817, signing gained an institutional setting where it could be taught, transmitted, and expanded. Deaf communities formed around schools, associations, clubs, and residential institutions, creating a foundation for future interpreting services.
For generations, interpreting remained closely tied to personal relationships and local knowledge. A person might interpret at church on Sunday, at a doctor’s office on Monday, and during a town meeting later in the week without formal training or recognition. The work was essential, but its linguistic and professional complexity was often overlooked.
Education and the pressure for access
The growth of public education for Deaf children increased the need for communication between Deaf students, hearing teachers, administrators, and families. In some classrooms, teachers signed directly. In others, staff members or educational aides interpreted spoken instruction. These arrangements varied widely, and many schools had no consistent expectations for qualifications, confidentiality, or language proficiency.
The late nineteenth and early twentieth centuries also brought a major shift toward oral education. After the 1880 Milan Conference, many schools reduced or prohibited signing in favor of speech and lipreading. This policy limited students’ access to their natural language and changed the role of people who supported communication in classrooms. Interpreting was often treated as a temporary accommodation rather than an essential educational service.
Deaf communities resisted language suppression and preserved ASL through social organizations, residential schools, families, and community events. Their advocacy eventually influenced linguistic research, educational policy, and public understanding. The recognition of ASL as a complete language helped establish that interpreting involves complex language transfer, cultural mediation, and professional decision-making.
The emergence of a national profession
A decisive step came in 1964, when the Registry of Interpreters for the Deaf was established. RID created a national forum for interpreters, encouraged ethical standards, supported professional development, and promoted certification. Its formation reflected a growing understanding that interpreters needed education and accountability beyond fluency in signs.
Early certification efforts helped distinguish interpreting from signing in casual settings. Interpreters began developing skills in consecutive and simultaneous interpreting, discourse analysis, professional conduct, and preparation for specialized assignments. Deaf people remained central to this development as language models, teachers, consultants, consumers, and leaders within interpreting organizations.
The profession expanded into legal, medical, mental health, business, and conference settings. Each environment required different vocabulary, protocols, and knowledge of power relationships. An interpreter in a courtroom, for example, must preserve the meaning and register of testimony while following legal procedures. A medical interpreter must handle sensitive information accurately and support informed communication without taking control of the encounter.
Laws that changed expectations
Civil rights legislation transformed access from a matter of individual goodwill into a legal responsibility. Section 504 of the Rehabilitation Act of 1973 established protections against disability discrimination in federally funded programs. The Education for All Handicapped Children Act of 1975, later renamed the Individuals with Disabilities Education Act, strengthened educational rights for children with disabilities.
The Americans with Disabilities Act of 1990 extended broad nondiscrimination protections to employment, government services, public accommodations, telecommunications, and other areas of public life. These laws increased demand for qualified interpreters and required organizations to consider effective communication rather than simply provide an untrained employee or family member.
Legal recognition also raised important questions about quality. A person who knows some signs may not be able to interpret accurately in a high-stakes setting. Modern expectations increasingly emphasize language competence, impartiality, confidentiality, cultural responsiveness, and assignment-appropriate qualifications. Credentialing systems have changed over time, yet the underlying principle remains clear: access must be meaningful, timely, and reliable.
| Period | Major development | Effect on interpreting |
|---|---|---|
| Before 1817 | Local signing communities and informal support networks | Interpreting relied on family, neighbors, teachers, and community members |
| 1817–late 1800s | Deaf schools and organized communities expanded | ASL transmission and demand for communication support increased |
| Late 1800s–mid-1900s | Oral education gained influence | Signing and interpreting were restricted in many institutions |
| 1964 onward | RID and formal credentialing efforts emerged | Interpreting gained professional standards and a national identity |
| 1970s–1990s | Section 504, education laws, and the ADA strengthened access rights | Public institutions faced legal duties to provide effective communication |
| Twenty-first century | Video interpreting, Deaf interpreters, and specialized practice expanded | Services became more varied, immediate, and context-specific |
Certification, ethics, and specialization
As demand grew, interpreter education programs appeared at colleges and universities. Students studied ASL and English, interpreting theory, Deaf culture, linguistics, ethics, and practical skills. Supervised experiences allowed new interpreters to work with mentors and encounter settings that could not be simulated fully in a classroom.
Certification pathways changed as national testing systems developed. RID offered credentials such as the Certificate of Interpretation and Certificate of Transliteration before later reforms created the National Interpreter Certification. State laws and educational requirements also influenced who could work in particular settings. Some states established licensure or registration systems, while others relied more heavily on national credentials and employer standards.
Ethics became a central part of professional identity. Interpreters must manage confidentiality, conflicts of interest, role boundaries, accuracy, and impartiality. They also need to recognize when an assignment exceeds their preparation and when a Deaf interpreter, team interpreter, specialist, or different communication approach would better serve the participants.
Deaf interpreters have contributed essential expertise in assignments involving language variation, DeafBlind communication, cognitive disabilities, trauma, legal matters, and clients with limited exposure to formal language. Their work demonstrates that interpreting is a collaborative practice grounded in lived experience and cultural competence.
Technology and the changing workplace
Telecommunications reshaped interpreting in the late twentieth century. Text telephones, captioned calls, and relay services improved access over distance. Video relay service later allowed Deaf callers who use sign language to communicate with hearing callers through an interpreter, creating a large and distinct area of interpreting employment.
Video remote interpreting brought sign language access into hospitals, workplaces, public agencies, and private appointments without requiring an interpreter to travel. It can be valuable when an in-person professional is unavailable, though connection quality, privacy, camera placement, lighting, and the complexity of the interaction all affect service quality. Remote access is a tool, not a universal replacement for onsite interpreting.
Interpreters now work across live events, streaming media, classrooms, legal proceedings, healthcare, theater, government, and corporate communication. Professionals who combine interpreting with training and accessibility consulting help organizations address broader systems rather than treating each communication request as an isolated event. Christopher Tester’s accessibility expertise reflects this wider approach, connecting interpreting practice with disability awareness, public communication, and inclusive design.
Building more responsive practice
The history of the profession shows that technical skill and social responsibility must develop together. Organizations seeking interpreting services should consider the setting, the participants’ language preferences, the complexity of the content, and whether the interpreter has relevant experience. Planning early is especially important for legal, medical, theatrical, and public events.
Strong practice also depends on collaboration with Deaf people. Consultation should happen before an event or program is finalized, rather than after communication barriers have already caused harm. Deaf advisors can identify issues involving language access, visual information, cultural expectations, audience experience, and the placement of interpreters or captions.
Organizations can apply the lessons of this history by:
- Hiring qualified interpreters with experience suited to the assignment
- Asking Deaf participants about communication preferences and access needs
- Providing materials, terminology, schedules, and context in advance
- Budgeting for interpreting as an accessibility requirement, not an optional extra
- Reviewing services with Deaf community members and acting on their feedback
Professional interpreting is strongest when institutions recognize the interpreter as part of an access plan rather than an emergency solution. That approach supports clearer communication, protects dignity, and respects the linguistic and cultural identity of Deaf and hard-of-hearing people.
The story of interpreting in the United States is still being written through advocacy, education, technology, and everyday professional practice. Organizations, educators, producers, attorneys, healthcare providers, and community leaders can help carry that work forward by investing in qualified services and meaningful Deaf inclusion. Seek informed accessibility support before your next program, training, production, or public communication initiative, and make effective communication part of the design from the beginning.