Generally speaking there are three ways to go with bonus languages.<br/><br/>1) Pick a friendly race that you have a lot of dealings with. For a high elf in the Neverwinter area (where Lost Mines of Phandelver takes place), that's probably going to be Dwarven. RA Salvatore is the main writer for this area and he has a huge hard-on for dwarf nationbuilding, so there's lots of dwarf cities in the area.<br/>2) Pick a hostile race that you spend a lot of time eavesdropping on and/or interrogating. That's gonna be either Orc or Goblin.<br/>3) Pick a rare language that only highly educated people know to show off how smart you are. That's usually going to be Draconic.