Source: Player’s Handbook
Here is quick to notice some details of your environment, that you could gain the below mentioned benefits:
- You are able to increase your Intelligence or else the wisdom score by 1, for almost maximum of 20.
- However if you could see the creature’s mouth while it was speaking to the language that you are understanding, you can also interpret whatever it’s saying by normally reading its lips.
- You do have the +5 bonus to your passive wisdom (perception) and also the passive Intelligence (Investigation) scores.