I just had another thought....
If you just want to cut the lettering separately and glue on top of the background but are concerned about spacing, use tracing paper under a second (or third) pattern to locate where the letters are and proper angle for them.
I would just cut the letters from one copy of the pattern, cut the background from a second copy and use the third copy with tracing paper over the background piece to trace out the letter position on the background to glue the letters in proper position.
Will that help?
Rog