That would have been during the port from RTW 1.2 to 1.5 which is a good 2 and half years (or thereabouts) ago. Since I wasn't a EB member at the time I can't really vouch for this, but I would hazard a guess and say that there never really was a swap: what appears as a swap is simply the effect of starting from scratch with the basics (porting over the factions in terms of descr_sm_factions and required symbols and such) and then gradually port code including updating the old references to cultures (that can be done reliably with N + 1 search and replace operations for N cultures) ...
As a matter of fact an artefact of the EB cultures is the abundance of "Western Greek" buildings: IIRC Foot once theorized a fix for this which had to do with how cultures are ordered.
Bookmarks