Dragonoids like the Lizardmen had better intelligence and as such understood a lot more than other Dragonic beasts did.
In fact, they could have an entire society too if they grew to larger numbers.
There were even entire cities that had Lizardmen living there along with other Dragonoids. The Lizardmen were just one of them as there were higher variants of the Dragonoids such as the Nagas, the Lamias, the Kobolds and finally the Dragonkin.
Among them, the Dragonkin were the highest ranked and looked almost the same as humans if not for a few patches of scales as well as their horns. They were also incredibly strong and well versed in both magic and weapons.
'Taming a Dragonkin is out of the question as no beast token will work on it. They're not beasts in the first place.' Arthur thought to himself.