Wait! Some of you are already a step ahead. What happens if there is only a single field deleted? The message should then read "field" instead of "fields". Ah, this is tricky. Well, there is a function that solves precisely that problem:
_n( $msg_single, $msg_plural, $number, $textdomain)
This function allows you to provide variations on messages when there are chances of singular or plural versions of the text. It solves one problem, but we discourage its use because it causes another: its translation strings do not get picked up by Poedit's radar. Remember, Poedit and the other tools used to generate language files rely on simple text parsing that grabs only the first argument from a defined translation function. In other words, only the message for the $msg_single ends up getting scraped. It's unfortunate that we cannot rely on a WordPress internal, but for cases like this we have to write our own if-statement if we want our POT file to be generated correctly:
$msg =...