Cannot translate Pop up text

I am using free version for now, i can′t translate what appear sin pop up and i use 2 languages in my website. so this is a problem. I use WPML but there only show plugin fields of “admin”, not the text to translate of popup create to show properly in each language.

The guide of WPML in documnetation does not help.

E.g: “Dia 1” in the pop up text (i write that), cannot show in english language as Day 1, as cannot translate, does not appear in any WPML string.