It says that the SWORD compiler was not found

The SWORD compiler is part of the SWORD API. Bibledit uses this compiler to export a project to SWORD format.

The most likely problem is that you did not install SWORD from source, but from a binary package. Binary packages do not always install the compiler. If you install SWORD from source, the compiler will be installed too.

The compiler used is a program called osis2mod. If the compiler has been installed, but Bibledit still cannot find it, the problem might be that the compiler has not been installed in the program search path. Type

echo $PATH

in a terminal to see the program search path.