Playground's default language can be changed on both mobile and web. See the instructions below to change your language.
Change Your Default Language on Mobile
The Playground mobile app is currently offered in both English and Spanish, with English set as the default.
Open your Playground mobile app.
Tap the three lines in the top right corner of your screen and then tap Settings.
Under the Account section, tap Language to open the Language Preference screen.
Tap the language your app should operate in. An alert will appear, notifying you that your app will briefly restart.
Tap OK. When your app has restarted, you'll be returned to the Home screen in the language you selected.
Change Your Default Language on Web
Log into app.tryplayground.com.
Click on your name in the top right corner and select Account Settings.
Next to the Language setting, click the dropdown menu, and select a language from the list.