X-ron
X-ron is the simplest language in the classicverse. Almost everybody away from Earth uses this language. 40% of everybody in the classicverse uses this language, and it is really similar to English. X-ron is said the same way as english besides a few words being different and the spelling of words are different. Words with silent letters are rewritten to make more sense.
If you go to any planet in the middle regions it's probably an 80% chance that most people speak X-ron on that planet. Basically nobody speaks X-ron on planets outside of the middle regions.