Adding the ~x86-macos keyword to vim-spell-en is all that is needed for it to install and run properly. I am using OS X version 10.4.8 with portage version "Portage 2.1.20.6152 (default-darwin/macos/10.4/x86, gcc-4.0.1, unavailable, 8.8.1 i386)." Reproducible: Always
thanks, committed