https://www.techradar.com/news/fortnite-on-switch-is-getting-built-in-voice-chat-this-week

Good news for Nintendo Switch owners who've jumped aboard the Fortnite bandwagon — from Thursday, the Switch version of the incredibly popular Battle Royale shooter will be getting built-in voice chat functionality. 

Chatting on Nintendo's current hybrid console is admittedly a convoluted process — in order to talk with friends (and only friends, mind) in Splatoon 2 (Switch's most high profile online title to date), players must first download the Nintendo Switch Online app on their iOS or Android device, plug their headsets into said devices and chat through them exclusively.