I've created a small package for the scripts - you can get the package here: stringmodding-scripts_0.0.2_all.deb

stringmodding-search and stringmodding-replace is what you want to use. Call them without parameters to see the usage information. The package "stringmodding-scripts" has been uploaded to Extras-Devel.

You still need to copy the output file (saved in the current directory) into /usr/share/locale - for this you need root rights.