Rabbi, a close friend is getting married soon and is interested in using a ketubah with modern Hebrew text (apparently this is starting to catch on in Israel). Is this permissible, and is there a Hebrew version out there you have seen that you feel is the most “authentic” or recommended? Thanks so much.
It is totally permissible. At the end of the day, this is a legal document, so any language, certainly Hebrew, is fine. It was originally in Aramaic because that was the vernacular. As to a good text to use, I found two good examples here and here.