How many languages did apostle Paul speak? Of course, he could speak Hebrew and from such examples like preaching the gospel in Athens it seems that he had no problem speaking Greek. He also wanted to visit Rome, while there were no Jews living in Rome at that time, so does it mean that he could also speak Latin? Also he wanted to go to Spain. Does it mean that he could also speak Spanish? Was Spanish existent at that time?
We know that he spoke Greek, Hebrew, and maybe Latin. The Latin conjecture is based on the fact that he was Roman and the official language of Rome was Latin.

Proof text for Hebrew:


  And when we had all fallen to the ground, I heard a voice saying to me in the Hebrew language, ‘Saul, Saul, why are you persecuting me? It is hard for you to kick against the goads.’ (Acts 26:14, ESV)


Proof text for Greek: 


  As Paul was about to be brought into the barracks, he said to the tribune, “May I say something to you?” And he said, “Do you know Greek? (Acts 21:37, ESV)