Mass Explanation

I guess when you write a scifi thing that completely changes the way the universe works you start to work it into a lot of your plot holes.
Before someone writes me an angry email, I think the actual explanation for everyone speaking the same language is a «universal translator» that everybody has, is never shown, and comes up I think twice in total during the course of Mass Effect 1 and 2 together, both in optional conversations. It also translates the hanar language (which is bioluminescence), which still counts as magic as far as I care.

You can watch this comic being drawn HERE.