I would like to make liquorice beer. I do not know if it has any link with
the famous root beer made with a modified extract.
From what I hear some of the European farmer use to make a brown beer with
liquorice root and anise seeds.

I never seen a licorice recipe precisely, but you might try using the
herb french tarragon, either in a specific recipe if you can find one,
or using any generic herb leaf wine recipe. French Tarragon is easy to
grow, abundant to harvest and is distinctly anise in flavor