Interacting With NPCs

You can attempt to influence NPCs and other creatures, usually by talking with them. Trying to persuade, charm, intimidate, bluff, bribe, calm, or otherwise interact with an NPC may require an Intellect roll against the NPC's level.

Interacting usually requires a common language or some other way to communicate. Trying to influence someone who doesn't understand your language relies on tone of voice, gestures, and so on, and is probably hindered by at least one or two steps.