Missing list of included modules using es.po

I can't reproduce this. You need to provide:
a) detailed instructions on how to reproduce the bug
b) a screenshot demonstrating the problem
c) details about what versions of everything you're using, etc.

I'm inclined to close this as a non-bug, since clearly the version that's released is working fine in testing (both local and from other people). Probably it's something broken with your configuration or usage.

The es.po translation has a bug:

#: update_status.module:1084
msgid "Includes: %modules"
msgstr "Incluye:"

Should be:

msgstr "Incluye: %modules"

Just committed the attached patch to DRUAPL-5--2, but you're welcome to apply it on your site or make the same change yourself as a work-around. There might not be another official release, at least not for a while.