No locales are installed. Looks like this is the same issue as in bug #5547.

Here is the relevant information from the build log. Not the linguas variable is empty.

Making install in po
make[1]: Entering directory `/media/system/tmp/portage/x11-terms/terminal-0.4.0/work/Terminal-0.4.0/po'
linguas=""; \
	for lang in $linguas; do \
	  dir=/media/system/tmp/portage/x11-terms/terminal-0.4.0/image//usr/share/locale/$lang/LC_MESSAGES; \
	  /bin/sh /media/system/tmp/portage/x11-terms/terminal-0.4.0/work/Terminal-0.4.0/install-sh -d $dir; \
	  if test -r $lang.gmo; then \
	    /usr/bin/install -c -m 644 $lang.gmo $dir/Terminal.mo; \
	    echo "installing $lang.gmo as $dir/Terminal.mo"; \
	  else \
	    /usr/bin/install -c -m 644 ./$lang.gmo $dir/Terminal.mo; \
	    echo "installing ./$lang.gmo as" \
		 "$dir/Terminal.mo"; \
	  fi; \
	  if test -r $lang.gmo.m; then \
	    /usr/bin/install -c -m 644 $lang.gmo.m $dir/Terminal.mo.m; \
	    echo "installing $lang.gmo.m as $dir/Terminal.mo.m"; \
	  else \
	    if test -r ./$lang.gmo.m ; then \
	      /usr/bin/install -c -m 644 ./$lang.gmo.m \
		$dir/Terminal.mo.m; \
	      echo "installing ./$lang.gmo.m as" \
		   "$dir/Terminal.mo.m"; \
	    else \
	      true; \
	    fi; \
	  fi; \
	done
make[1]: Leaving directory `/media/system/tmp/portage/x11-terms/terminal-0.4.0/work/Terminal-0.4.0/po'