And china bent knee to the mongols and one of their decendants ruled china for hundreds of years. And byzantium was a greek civilasation rahter than roman one. It was only roman in its name. And while a comouter may know 4000 characters a keyboard cant.
Western languages have ambiguity in the words not in the letters.
As for fantasy setting i dot have a problem with warhammer having it this way i have a problem with every fantasy and sci-fi seting having it this way. Take stargate for an example, the as hard there write with runes sure, but for some reason a civilisation that advanced use ideograpic runes instead of the phonetic ones that primitive humans would in universe have derived from their system. Take Eoin Colfer's fairies in Artmeis Fowl. Another civilasation thats supposed to be more advanced than humanity and is ideograpic. The only example i can think of of the opposite is Atlantis in "Atlantis Found" by Clive Cussler.