Spellchecker is stuck in Spanish
I'm using mint13 mate.
I installed The Spanish Mexico spell check feature in LibreOffice, and set it up, just to edit a couple of pages. I will probably use it from time to time, and when it's working it works very well. But most of my work is in English.
Now, the Spanish spellchecker is engaged for Firefox, FileZilla, and I don't know ow many other programs may be involved. I didn't set anything in Spanish on purpose except two documents in Libre office, and I haven't been able to figure out how to undo whatever settings are not right. Libreoffice seems to need to default to English (as I would want it to), except for the two documents that I deliberately switched (which is fine). But how do I get the rest of the system back to English? And is there a way to set it up to make the switch simple next time?