FWIW the Orthodox churches also use the term "catholic" when referring to themselves. Sometimes it is translated (as "universal"), but oftentimes it's kept in the original Greek. In some cases there are deliberate distinctions introduced to keep the two meanings apart: e.g. in Russian Church use, "Catholic" in the sense of Roman Catholic is "katolik" (mapping to Latin), while "catholic" in its original meaning of "universal" is "kafolik" (mapping directly to Greek).