Celtic reforms even possible?

[athanaric]

Building all the required stuff yourself will get you the reforms much faster than waiting for the dumb AI to help with that, anyway.

[Fluvius Camillus]

I think you misunderstood, it just means that all Celtic factions together should have that, so that means you and the others or just you alone if you are the only celtic faction

[Mediolanicus]

Building all the required stuff yourself will get you the reforms much faster than waiting for the dumb AI to help with that, anyway.

The AI always builds up their cities faster than me, so actually it's always the AI that triggers the reforms in my campaigns.