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Note added at 8 mins (2023-04-01 17:37:50 GMT)
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Checkout
إنهاء

Sign out
تسجيل الخروج

"Checkout" is the process of finalizing a purchase and submitting payment for the items in a shopping cart. This action is typically performed on an online shopping website or application.

"Sign out", on the other hand, refers to the act of logging out of an account or session on a website or application. This action is typically performed to secure personal information and prevent unauthorized access to an account.

Checkout لا تعني الخروج بل تعني إتمام عملية الشراء
برجاء الرجوع إلى التعريفيين التاليين:
Checkout is the point in the shopping process where consumers finalize their purchases and pay a business for certain products or services.

The checkout process is the process a customer goes through to finalize a purchase when shopping on an online store.

That's the translation used by Microsoft for "checkout"
https://www.microsoft.com/en-us/language/Search?&searchTerm=...

As for "sign out", Microsoft translates it as "تسجيل الخروج / الخروج"
https://www.microsoft.com/en-us/language/Search?&searchTerm=...