Absolutely! Koast can create ad copy variations in any language, including regional differences like British English, American English, Brazilian Portuguese, and more.
Go to the Ad Builder section, and then click the Copy Settings button, just below the Offer/URL label:
A new modal will pop up. Now you just need to replace the default English language with the one you prefer:
Close this modal and generate your ad variations! To learn more about Copy Settings, please check this article.