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I suspect you have to reset the Garmin GPS 60 back to default condition - this will prompt it to get you to set the language (English, not Espanol) and the time-and-date, what the device does when power fails, etc.
These are initial settings for the user when they first acquire the system.
Or try something like this, which may perhaps work if you can just read the Spanish language labels (in bold type below) in a phonetic sort of way:
1. Go to the Setup menu, and
2. highlight Sistema
then press ENTER.
3. Use the rocker to highlight Lingua (that's what it ought to be called), press ENTER, then highlight
and press ENTER.
Let me know if that works, or if it doesn't, where you find the point at which it is difficult.
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