Starting at 1st level, your alien knowledge gives you the ability to touch the minds of other creatures. You can communicate telepathically with any creature you can see within 30 feet of you. You don't need to share a language with the creature for it to understand your telepathic utterances, but the creature must be able to understand at least one language.
This "universal translator" ability appears to be just as powerful as the 3rd level spell "Tongues," and possibly more so in limited situations because it is always on.
A warlock can also get suggestion as a 2nd-level spell:
You suggest a course of activity (limited to a sentence or two) and magically influence a creature you can see within range that can hear and understand you.
So it seems to me that a Great Old One warlock who speaks only Common could get within 30 feet of a goblinoid who speaks only Goblin, and communicate telepathically with Awakened Mind while speaking suggestion as a 2nd level spell. The goblinoid can hear the voice, and the goblinoid can understand the telepathy.
However, I suspect that some DMs would rule that the Warlock must be able to be understood just from the spoken words and not from any additional telepathy.
Does this work? Can a Great Old One warlock use Awakened Mind as a universal translator for Suggestion spells?