Okay kiddo, so the Honourable Society of Cymmrodorion is a special group of people who love Wales! They started a long, long time ago - over 250 years ago - to celebrate and keep alive Welsh language, culture, and history.
You know how some families have special traditions, like making certain foods or telling certain stories? Well, the Cymmrodorion society is kind of like a big family that does that for all of Wales. They want to make sure that people remember what makes Wales special and different, so they organize events, publish books and journals, and give awards to people who do good things for Wales.
They even have a special motto, which is "Tros ryddid gollasant eu gwaed", which means "They shed their blood for freedom". That means they remember and honor the people who fought for Wales to be a free country.
So basically, the Honourable Society of Cymmrodorion is a really cool group of people who care a lot about Wales and want to make sure that its traditions and history don't ever get lost.