Here is a crazy idea I wanted to share: I remember in one of the twitch-streams Josh mentioning that the annotaion system from Tyranny is being moved to PoE2: Deadfire. It will provide not only lore but also translation of foreign languages. Now I assume it is nothing big, just couple words, or phrases here and there. BUT WHAT IF:
There are many factions from different regions. They speak different languages. WHAT IF you could only understand languages you know as a character - for example in PoE1 I played as an Orlan from Old Vailia. That would mean my character understands Vailian. The game would provide translation of Valian phrases but not Aedyrian or language of native Deadfire tribes. On the other hand, I might have Aloth in a party and he might act as a translatior for the Aedyrian. It might give your character and party a better sense of belonging and origin. Now, WHAT IF the foreign conversations weren't just small phrases. WHAT IF when walking up to a couple of Vailians talking you would be able to overhear a bit of their conversation. It would be a gibberish if you don't know the language, but you would learn something more, if you do. Some flavour text, get insight into their motivations, extra details about quest etc. Now if that would be implemented into quest design it could get interesting - Opening new ways, hints about possible ways to resolve situations, extra loot stashes. What is more, as a character you might get drawn to the faction which speaks your native language, as your interactions with them would be more... complete so to speak. I think it would be a nice and fluid way of connecting character with his background and the world around him/her. Naturally, the idea isn't simple at all, as it would require dedicated writing and quest design. But hey, just throwing it out there.