One thing that isn’t entirely clear regarding the Nintendo Switch is how players will communicate with other. The official Splatoon Twitter account says that Splatoon 2 will support online lobbies and voice chat through the official Nintendo smartphone application. Siliconera has translated the information and found out the following:
The game and app works together by letting you invite friends via social media, then start up a game and voice chat with your buddies. The voice chat also works with the game. For example, prior to the teams of a private match are set, players will get to talk to each other, but once the teams are decided, you’ll only get to speak to your own teammates. However, you won’t get to talk to strangers in the same way.