[Home](./index.md) > [@firebase/auth-types](./auth-types.md) > [Auth](./auth-types.auth.md) > [useDeviceLanguage](./auth-types.auth.usedevicelanguage.md) ## Auth.useDeviceLanguage() method Sets the current language to the default device/browser preference. Signature: ```typescript useDeviceLanguage(): void; ``` Returns: void