Since the conceit in EoE is that everyone on the ship understands each other, I'm going to leave it up to Leif to decide how that works for him. If he would rather not write out the translation, but instead explain what his growls mean in exposition, I think that is acceptable.
I'll endeavor to not use that blue. It's the one I always use for PbPs so I may slip up. The reason most people use color is to help highlight the text. In some games, particularly Shadowrun, different colors are used for different forms of communication to help distinguish what is being said, written, texted, thought, and projected.