Mediolatinitas

Likely calqued on/adapted from French médiolatinité (“Medieval Latin”), Italian mediolatino (“Medieval Latin”, adj. and subst.) or another Romance language, and is more in line with Greek than with Latin word-formation models. Analyzable as Mediolatīnus (“of or pertaining to Mediaeval Latin”) +‎ -tās (“-ity”) or medius (“middle”) +‎ -o- +‎ Latīnitās (“Latinity”).

• (Classical) IPA^(key): /me.di.o.laˈtiː.ni.taːs/, [mɛd̪iɔɫ̪äˈt̪iːnɪt̪äːs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /me.di.o.laˈti.ni.tas/, [med̪ioläˈt̪iːnit̪äs]

Mediolatīnitās f sg (genitive Mediolatīnitātis); third declension

1. (Contemporary Latin, very rare) the characteristic idioms and compositions of the Latin in use during the Middle Ages, Mediaeval Latinity

Third-declension noun, singular only.