Background of the issue:
I'm trying to translate GiveWP plugin forms on my website hidden link. The default language of the website is Croatian, and the form language is English. I need to translate the form to Croatian and German. I can create three forms, each in an individual language, and add them via shortcode. I've done that, and it works, but I have an issue with one sentence that I cannot change: the label 'Choose custom amount'.
Symptoms:
The label 'Choose custom amount' stays the same on all three forms, and string translation does not help.
Questions:
How can I translate the label 'Choose custom amount' in the GiveWP plugin forms?
Why does string translation not work for the 'Choose custom amount' label?