Can’t translate “List | Month | Day”

Hi,

Trying to translate this plugin to Croatian. I have done almost everything using Loco Translate, but 3 words remains without any change, no matter what I do. In the Calendar view for users, it is possible to select between List, Month and Day view. Those 3 words are not responding to changes I do in Loco Translate. Also, the same is in the Admin CP, I have same 3 words there. They always remain in English.

I tried changing to some other language. When I install French, labels are List, Month, Jour. When I set to Spanish, labels are List, Month, Dia.

Are those labels in some other Language file, i.e. main WordPress language file, or in the Theme? I am using ThemeGrill ColorMag. I searched in all language files that I could think of, I also did my search from CPanel file manager, just to make sure it is not related to Loco Translate plugin. I am quite sure that wherever a word “Month” pops up, I changed it (added translation) to something else. Cleared browser cache, cleared cache and minified js from WordPress, but still no success.

Any idea?