Since Christianity was founded in Roman Judaea where Aramaic was both the day-to-day language and the lingua franca, that might be considered the "original" language but it pretty quickly incorporated quite a few people who spoke other languages. It is assumed to be the language Jesus spoke in every-day conversation.
Christianity is a religion, not a language.
"Christianity" has never been a language. It has always been a religion.
Christianity is mostly and American and European religion, so typically English. But Christianity is a religion that is practiced throughout the world, so there is no "language."
Language--English Religion--Christianity
3.14threeMortimerIt
Christianity and written language. Christianity came from the Roman/ Byzantine Empire. Written language came from the greeks. (Axum adopted the 'Geez' language that was invented in ancient Greece.)
The Bible is translated into all languages, there is no special language for it.
Christianity has no uniform language, so a Christian would hello in the language of their home country.
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Latin. Another View: Love.
The Spanish language. Catholic Christianity.
Christianity is (das) Christentum.