Hi Jeff, thanks for the reply! Not sure I understood that other post correctly, but here is what I tried:
1) Set the project's language back to English
2) Left my PC regional settings set to English
3) Compiled the help
4) Set my PC to Spanish (Chile)
5) Launched the CHM help
That did fix the title (which I hadn't even noticed was broken), but the tabs and button names are still in English. Did I interpret that post incorrectly?
It's my understanding that the LNG file will not have an effect on CHM output. It's more for the web based outputs. And it's also my understanding that the tabs will only correctly display if you are using the CHM on an honest to goodness Spanish version of Windows. Not where the Windows is actually English, but configured with Spanish settings.
Ah ok, I can send the CHM to my coworker in Chile and see what it does on his system. Thanks Rick and Jeff!