Well, the definition of the term dead language seems to disagree with both the pope and with your processor.
Dead Language:
"A language which is no longer in everyday spoken use, such as Latin."
"A ​language that is no ​longer ​spoken by anyone as ​their ​main ​language:
​Latin is a ​dead ​language."
"A language, such as Latin, that is no longer learned as a native language by a speech community."
"Languages that are no longer spoken.
Note : Some dead languages, such as Latin, ancient Greek, and Sanskrit, may nevertheless be studied by large numbers of people because of their literary or historical importance."
"In linguistics, language death (also language extinction, linguistic extinction or linguicide,[1] and rarely also glottophagy[2]) occurs when a language loses its last native speaker."