1. "Prescinding from what his divine knowledge meant in terms of languages ..."
I suspect that Christ's divinity has a greater purpose than supplying you with an evasive answer.

2. It is safe to presume that the ordinary everyday language of Jesus was Aramaic. We can also surmise that if Joseph was a tradesman, then to deal with customers, Joseph – and so Jesus – would have knowledge of the ordinary language of the Empire, namely Greek. 

3. The real discussion should be There is a tradition that there was an anterior Aramaic version of the Gospel according to Matthew. However, the only early extant scraps of the New Testament we have are in Greek. Latin as a language of the Church comes much later ... Tertullian, for example.

3. There clearly were buildings that Christians used for worship ... but they were not buildings whose sole purpose was prayer/liturgical celebration which is what the word "church" (in its architectural meaning) usually designates.