Thank you so much for your reply, Niall!
I looked for connect.facebook.net in the source and indeed found another reference. The relevant parts follow:
<link href="https://mysite.com/mysitefolder/wp-content/themes/arthemia/images/favicon.ico" rel="shortcut icon">
<link href="//connect.facebook.net" rel="dns-prefetch">
<link href="https://mysite.com/mysitefolder/xmlrpc.php?rsd" title="RSD" type="application/rsd+xml" rel="EditURI">
<link href="https://mysite.com/mysitefolder/wp-includes/wlwmanifest.xml" type="application/wlwmanifest+xml" rel="wlwmanifest">
<meta content="WordPress 3.4.2" name="generator">
<style type="text/css">
<meta content="Neighborhood School Parents' Association" property="og:site_name">
<meta content="website" property="og:type">
<meta content="hi_IN" property="og:locale">
<meta content="Neighborhood School Parents' Association" property="og:title">
<meta content="building strong families in the Bronx, NY" property="og:description">
<meta content="https://mysite.com/mysitefolder" property="og:url">
<script id="facebook-jssdk" async="" src="https://connect.facebook.net/hi_IN/all.js">
I turned off every plugin except for Facebook and Pixopoint Theme Integrator (without which my site crashes) and we still have the problem with the foreign locale– which briefly was the US again before it became Indonesia, where it is now stuck.
You can see in the following line that something is setting my locale and this is being reflected in the Facebook plugin. I am not sure what or why!
<meta content="hi_IN" property="og:locale">
Would very much appreciate any suggestions you have.