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
The Bible is translated into all languages, there is no special language for it.
3.14
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.)
Christianity has no uniform language, so a Christian would hello in the language of their home country.
Latin. Another View: Love.
Christianity is (das) Christentum.
The Spanish language. Catholic Christianity.