[Решено] Translation not showing up

Background of the issue:
I am trying to translate some strings on my checkout page from French to English using WPML. The site I need help with is скрытая ссылка.

Symptoms:
Some strings in my checkout page do not translate when I switch the page to English; it remains in French. However, the string translation shows that they are translated correctly.

Questions:
Why are the translated strings not showing up on my site?
How can I ensure that the translations appear correctly on the checkout page?