Tribes, do they have a gameplay effect?

[cmacq]

Hello again

I'm still playing my Boii campaign and have tons of fun! Recently I conquered the region of Lugidunon where a building representing the tribe of the "Guotones" (?) is present. besides the ever appreciated historical information, do these tribal icons have any gameplay effects? I noticed that I could only build a Allied governement, but thought this might be because the predominant culture is different from my own.
The only other province I conquered so far was Noreia where I could build a confederation, making them a full memeber of the Boii.

many thanks for you answer.

I believe for the Boii Faction this "Guotones" is a mix up of the Celtic Cotini, located in Slovakia and southern Poland characterized by the Púchov culture and Tyniec group due to Tacitus' render "Gotini" in Germania. Some have wrongly mistaken the Cotini for the Germanic Gutones confederation. Here we need to change "Guotones" to "Cotini" or some such east Celt-like literation.