IEF (Imperial Expeditionary Force) is as much Roman as Nords are Viking or Rhodok Italian. It's just total fiction world and it's just stilization. They do speak "latin" and are ruled by Senat (thus SPQR). There might be a problem with R in SPQR as it means Romanus but we can place virtually enything beginning with R there
Any ideas for what R means in Senatus Populusque R......us?