sessionConfig when you call init(), and can be changed later with updateSessionConfig(). For language, see Language support.
Currency
Set the optionalsessionConfig.currency at initialization, or update it alongside the locale:
EUR (Euro), USD (US Dollar), CNY (Chinese Yuan), KRW (South Korean Won), and TRY (Turkish Lira). Currency controls monetary display in wallet balances, transaction amounts, and on-ramp/swap interfaces. The update returns the complete AirSessionConfig, including locale and currency.