Not all strings are replaced despite translated

I have a registration form but I see that there are fields that are not translated even though I have translated all strings that appeared in the translation panel in joomla backend.

Where are these missing translations located so I can translated the missing texts.
In this link you can see that there are parts that remain in English...

vbac-israel.co.il/doula/online-products/...eo-tips/sign-up.html

Hi Shira

Look at the form, I saw that all the strings were translated to your language. So what string you are talking about?

Tuan

I am having same issue at: v2.bohan.pl/index.php/pl/bohan-pro/doste...ro-1-miesiac/sign-up

OK, those fields are Custom fields, issue resolved.

Yes. Just for your information, when you use the extension on none English language, there are other places you will need to translate, too. See membershipprodoc.joomservices.com/basic-...one-english-language

Regards,

Tuan