Good day @linjianting,
Thank you for your post and welcome to the Community Forum.
The locale renders components. By default PayPal detects the correct locale for the buyer based on their geolocation and browser preferences. It is recommended to pass this parameter only if you need the PayPal buttons to render in the same language as the rest of your site.
Please contact your website developer to refer the below guide link to add the locale value as "en_US" to make United States.
https://developer.paypal.com/sdk/js/configuration/#link-locale
https://developer.paypal.com/docs/archive/checkout/reference/supported-locales/
https://developer.paypal.com/docs/api/reference/locale-codes/?mark=locale#
Sincerely,
Chiranjeevi
PayPal/Braintree MTS
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