Iconodule
Hoplitarches
As Sts Cyril and Methodius found in Moravia, translating the liturgy into local vernaculars was a point of controversy in the West. The prevailing attitude in Rome was that there were a few sacred languages- Hebrew, Greek, Latin (maybe Syriac too?) and that was it. Pope Nicholas seemed to have gone against the grain in supporting their Slavic liturgy, against the wishes of Latin clergy in the region, and his successor Stephen V overturned this support.