Well, my .po file had issue:
I had to modify it manually, my structure looked like this:
#: id:418 context:Spear
msgid "Arrowhead (id: 418)"
msgstr "Punta de flecha"
BUT Glen's exported file looked like this:
#: id:418
# context:Spear
msgid "Arrowhead (id: 418)"
msgstr "Punta de flecha"
so, I had to move context line under and add # in front of it. Now it works, but the sounds are not linked to it. So, I exported csv file with all text and speech lines, keeping both languages in there.
I added speech lines from English tab to Spanish tab, but it doesnt play during a game...I have to figure why.