I know this is well meaning, but you should know that in the disability community it's very common to have people invent tech for us without fully understanding our needs. (Smart canes, for instance.)

What your demo shows is a model understanding fingerspelling. Fingerspelling is ... a very small part of sign language.

To make the claim you are translating sign language you need to understand facial expressions, hand positioning/motion (help you vs help me, same hand shape, different positions/motions), classifiers, and a ton more stuff.

It's a really beautiful language, and I encourage everyone to learn it, but for your project I'd be very careful to not make a claim about translating sign language.

In the mean time, it sounds like you've got some passion for accessibility work? We're always looking for more skilled engineers to work in the a11y space. It does require some humility and willingness to listen to others needs.