Google jester has s lot.
They mention a handful jesters other countries who could get away with joking about political stuff/noble people etc.
UK specifically mention a couple iirc.
Wiki I know also not definitive, can you point me to more info? Cos the general picture painted is more what I thought.
For eg-
'A jester, court jester, or fool'
'This modern term derives from the older form gestour, or jestour, originally from Anglo-Norman (French) meaning storyteller or minstrel. Other earlier terms included fol, disour, buffoon, and bourder.'
(Dunno what all mean but buffoon I get!).
'Jeffrey Hudson had the title of Royal Dwarf because he was short of stature. One of his jests was to be presented hidden in a giant pie from which he would leap out.'
'Scholar David Carlyon has cast doubt on the "daring political jester", calling historical tales "apocryphal", and concluding that "popular culture embraces a sentimental image of the clown; writers reproduce that sentimentality in the jester, and academics in the Trickster", but it "falters as analysis".'