Problems with language file

How can I change the language for a specific part of HikaShop and not another. For example, I changed the the language for the "Next" language to "complete purchase" with the checkout button in mind but it also changed the language in my pagination. How can I make this language change only for the checkout button and not another part of the website?

In that case you need to edit the file step of the view checkout, change the NEXT word to something else like HIKA_NEXT and use that HIKA_NEXT translation key in your translation override so that it doesn't change the default next translation of pagination.