To find out the signs for "dad" and "mum" in your local sign language, you can:
* Contact your local deaf community or sign language organization.
* Look for online resources for your specific sign language. Many websites and videos are available online dedicated to teaching sign language.
* Take a sign language class. This is the best way to learn the signs and the cultural context behind them.
Remember: Learning sign language is a journey, and it's important to be respectful of the different variations and cultural nuances within each sign language.