Title II of the ADA prohibits discrimination against qualified individuals with disabilities in all programs, activities, and services of public entities. It applies to all state and local governments, their departments and agencies, and any other instrumentalities or special purpose districts of state or local governments. It clarifies the requirements of section 504 of the Rehabilitation Act of 1973, as amended, for public transportation systems that receive federal financial assistance, and extends coverage to all public entities that provide public transportation, whether or not they receive federal financial assistance. It establishes detailed standards for the operation of public transit systems, including commuter and intercity rail (e.g., AMTRAK).
In the context of employment, the ADA prohibits employers from taking disability into consideration in all aspects of the employment relationship—from hiring to firing and virtually everything in between. The law also requires employers to make reasonable accommodations for individuals with disabilities to help them do their job. Outside of employment, the ADA requires most public places, such as shops, restaurants, and movie theaters, to be accessible to those with disabilities. State and local laws can also provide further protections.
The next factor is language. Although web design doesn’t require someone who speaks the same language, it’s important that your designer understands your requirements. This can be more difficult if you don’t speak the same language fluently. You can interview a freelancer to explain your requirements and get a feel for their understanding of the project before you begin.
While legal considerations might be your biggest worry, making your site more accessible is simply good customer service. More than 39 million Americans are blind and another 246 million have "low vision," Another one million are deaf in the U.S. Add to that people with mobility issues that prevent them from using their hands and that's a huge portion of the country's buying power.