I had the same problem, but i solved it changing something in LibSwag.lua In the -- Spell names and types myLib.lootSpells = section go to "-- esES" and put "apertura" instead of "abriendo"
Anyway i have some problems with some noddes, one of them is the Dark Iron Deposit.
I'm also working on something that will remove our problems with not having all the localized spell names. I just need to find some time to test it before I push it out.
I've found many noddes that aren't in the file and many which aren't right. I don't remember which are the modified ones. I could send you my GathererNodes.lua file if you wish but i don't not who or where.
You can upload the file to http://up.norganna.org/ and then provide a link in a follow up post here. I will take a look, and try to get the changes in.
Here it's. It took time but I've put some nodes more now i think that are the same nodes as in the english localization. By the way I've found a bug with 2 nodes. The "Adamantite Bound Chest" and "Bound Adamantite Chest" nodes has the same name in spanish "Cofre reforzado con adamantita", if i put both in the list the program doesn´t identified the "Adamantite Bound Chest" (181802). I don't know if the problem exist with the other node because I've any.