Encoding issue with Spanish/French

The non-English characters in the Spanish and French translations are displaying as boxed question marks for me.  See http://imgur.com/a/lJ2Ho.

This is with Chrome's encoding set to UTF-8, on latest Linux Mint.  If I change to ISO-8859-1 it seems to display correctly.  I downloaded the file and tried to open in gedit, and was getting charset decoding errors until I choose the ISO-8859-15 encoding.  I understand there are small discrepancies between several "Western" ISO encodings, so I am not sure which one this file is actually encoded as.  It should be specified so that the page will decode properly no matter what the user's encoding is set to.  The recomendations [here](https://developer.mozilla.org/en-US/docs/HTML/Element/meta#attr-charset) on the HTML5 `<meta charset="">` tag look good.