The set of Men of Harlech in the DT is the most commonly used English language version, though there are a number of different translations and adaptations of the Welsh original.  The words used in Zulu were written especially for the film by Ivor Emmanuel, and so are not the Welsh anthem, though they use its tune.  The text was given in this previous discussion:  Men of Harlech.

There are several versions of Katy Daley in this previous discussion:  Lyrics to Katy Daley.  Found, as ever, through the very useful "Digitrad and Forum Search" box quite prominently displayed on the main Forum page, which we do encourage people to try for themselves before starting new threads, especially when dealing with very well-known songs.  Of course, you have to bear in mind that titles and spellings -particularly of names- do vary.

Malcolm