Paypal Checkout Button

¿How can I change the message "Pagar" to "Check out" or "Buy Now"? It have to be in english, the main language of the customers. 

I tried to change the language of the account, or the form, but not luck.

Have a good day! I hope you could help me with this 

I checked your form, and the "Checkout" wording is showing:

And you can change the Label in the integration:

Let us know if you have any further questions.

Thank you!