On the human level, Jesus would have spoken Hebrew since this was the language of Jews and Israelites. And Aramaic was the language mostly used in the Old Testament Bible.

On the divine level, as the Son of God, Jesus could speak any language He wanted—including Heavenly languages.

Since Jesus, the Father and the Holy Spirit are linked as One, whatever the Father or the Holy Spirit did, Jesus could do. In the book of the Acts of the Apostles in the New Testament Bible, chapter 2, the Holy Spirit allows the apostles to speak in different tongues (or languages). Clearly, if they could do this, so could Jesus. He also spoke freely to the woman of Samaria in the Gospel of John, chapter 4, and it is to be presumed that He spoke in her language.