Probably you were in a release before libreoffice-dictionaries took over and is now shipping mythes-es. At least ubuntu 16.04 (xenial, released a month after your bug report) has it.
https://launchpad.net/ubuntu/xenial/+package/mythes-es ** Package changed: mythes (Ubuntu) => libreoffice-dictionaries (Ubuntu) ** Changed in: libreoffice-dictionaries (Ubuntu) Status: New => Fix Released -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to libreoffice-dictionaries in Ubuntu. https://bugs.launchpad.net/bugs/1558596 Title: Spanish missing Status in libreoffice-dictionaries package in Ubuntu: Fix Released Bug description: I want to add a Spanish thesaurus. I want to use it with Lyx 2.1 in Ubuntu 14, but the only packages available are mythes-ca mythes-de mythes-en-au mythes-fr mythes-it mythes-pl mythes-ru mythes-sv mythes-cs mythes-de-ch mythes-en-us mythes-hu mythes-ne mythes-ro mythes-sk Any suggestion on how to do it? There are a lot more in the Debian repositories. Link for the Spanish package: https://packages.debian.org/sid/mythes-es To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libreoffice-dictionaries/+bug/1558596/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp