No one in the game time use the term 'Byzantine Empire' too... Yes paradox use some ahistorical names for titles, but just because it's easier for the player.
That is completely a different case; the
Byzantine Empire is a standardized term both colloquially and in professional literature for the Eastern Roman Empire; there is even a special branch of the humanities called
Byzantology (or more correctly according to some
Byzantinology). My point, although not excluding, does not fold down to the argument of actual historicity of contemporary naming; if such were the case we would have problems of similar stature with a whole range of countries across the universe; though not being in this game, e.g. with the realms of the Ancient Near East, including even the Persian Empire.
However, those are terms that have been for whatever reason accepted to depict a specific political term.
There is
no such acceptance in the place of the Early Middle Ages Serbia, where using the term "Rascia" for it equals =
a failing grade for not paying attention to literature (and potentially written sources). For the sake of comparison, that might be paramount to (with a bit of overestimation for argument's purpose) stating that in the Greco-Persian Wars, the Greeks fought against the Sassanid Empire (Greco-Sassanid Wars?). :unsure: Or maybe it were the Greco-Hellenistic wars, with the Greeks fighting off Seleucid hordes at the Battle of Thermopylae?
It is simply a non-historical error -
dissimilar from the Byzantine case...
In what sense is it
easier to the player that Mutimir is a Rascian and not Serbian Duke?