plugins – Text change in Advanced Customs Fields

I have edited the website which is not created by me.
There is advanced customs fields used for entry data during the post/page creation(wordpress custom editor). After that, the value of entered text is shown on the publicated page in the table, but table has the labels for entered data.

I was wondering how can I change the labels in any php file, but cannot find anything.
I would be gratefull for any tips,

Thank you,
Raf