celtiberians were a mixture of Iberian and Celtic peoples and culture This is an usual mistake. Celtiberians are a evolution of the previous tribes and the indoeuropean firsts migrations, a lot of time before celts, and iberians are the evolution of previous tribes with the inflouence of greeks and Phoenitians. So, there are different tribes and peoples with only one thing in common, the name (roman name) and the place they live, the iberian peninsula. Their culture, cities, organitation, language, etc... are different. Because of it, if you put Viriato (lusitanian leader) as a Iberian leader, is the same that name Alexander as Epirus leader, for example (in fact, epirians and macedonians had more in common than celtiberians and iberians). I know that this cuestion can be excesive in a simple computer game, but i thik you are doing a very good work and its interesting that the result will be as perfect as its possible. Pd: its difficult for me to explain my arguments in english , i hope you can undertand me