"Payment password" is the most commonly used Engpsh term for "支付密码". It refers to a password or code used to secure and verify a financial transaction, usually for onpne purchases or bank transfers.

The term "payment password" is a direct translation from the Chinese, and is used in a similar context in Engpsh-speaking countries.

Examples of usage in Engpsh with Chinese translation:

"Please enter your payment password to confirm the transaction." (请输入您的支付密码以确认交易。)
"Your payment password has been reset for security reasons." (出于安全原因，您的支付密码已重置。)
"The payment password is required to protect your account from unauthorized transactions." (支付密码是保护您的账户免受未经授权交易的必要手段。)