For what it's worth, in my one campaign setting there is an organization known as the Druid Council. They are the rulers of large tracts of lands and in those areas as well as the organization itself is organized into three main tiers. At the very top are the druids themselves who watch over the realms and act to preserve and cultivate the various environments, no matter what your specialty. Just below them are certain arcane spellcasters most notably witches and sorcerers of various nature oriented patrons and/or bloodlines. Below them are the more martial classes with rangers at the top of this pecking order followed closely by hunters, barbarians and other nature oriented specialty warriors as well as bards who act as lawyers in all legal matters where the Druid Council holds sway. Below them is everybody else. For anyone in the top three tiers Druidic is a bonus language, a kind of secret code based on Ogham which was a real world language that was a purely written code. The idea here is that between the different tiers, writing in druidic allows for the passage of secret messages back and forth.