Medieval Latin
Refers to the form of Latin used in the Middle Ages, roughly from the 6th to the 15th century, in scholarly, ecclesiastical, and legal contexts.
When reading Medieval Latin texts, one must pay attention to vocabulary and grammar that differ from Classical Latin.
Ecclesiastical Latin, the form used by the Roman Catholic Church, which overlaps with but is not identical to Medieval Latin.
Compound of 中世 (medieval) + ラテン語 (Latin language). A straightforward modern academic term.