A few things to note here. I recommend if you can get the "Comprehend Languages" spell you start doing it. I'm throwing you guys a bone right now, but not everyone is going to speak common or any languages you may even hope to have in the future. Also I'm making a little GM over rule and treating the Comp languages spell like "Tongues" spell, so you will be able to understand and speak it while it's in effect. This is because it's going to be a paramount thing in the game and it's unfair to expect you guys to fly blind until tongues is available.