From FP 2002 Help:
Change the page-encoding language for saving or loading a page
By default, Microsoft FrontPage sets the encoding of pages based on your
keyboard language when you first type on a page, or uses the web site's
default encoding to determine in what character set to save and load
pages. If no site is open, FrontPage uses the default encoding specified
for your computer. However, you can specify a different encoding for
individual pages.
About saving pages
The HTML encoding option lets you specify which HTML encoding FrontPage
should use to save a page. For example, if characters on your page are
not recognized by the default encoding, these unrecognized characters
are saved by embedding additional information in the page's HTML code,
thereby increasing the size of the file.
While a few characters might not pose a problem, you probably don't want
an entire page of characters saved this way, so you should specify the
correct encoding for the page. For example, if the default page encoding
for the web site is US/Western European but the page is written in
Greek characters, you should set the encoding for saving pages to Greek
or Multilingual.
When you save the page, the HTML encoding you specify is included in the
page's HTML code, telling Web browsers how to read the text in the page.
About reloading pages
If a page's HTML encoding is not specified, (for example, a page created
in NotePad), FrontPage must guess the page's encoding when it loads the
page. If FrontPage guesses incorrectly, the page will not be displayed
correctly. You can specify the correct encoding to use when the page is
reloaded.
Warning If the current page is being displayed incorrectly, you might
corrupt the contents of the page by saving the page over the original.
To set a pages HTML encoding, use the following procedure.
In Page view, right-click the page, click Page Properties on the
shortcut menu, and then click the Language tab.
Under HTML Encoding, do the following:
In the Save the document as box, select the character set in which to
save the current page.
In the Reload the current document as box, select the character set in
which to load the current page, if the current page is not displaying
text correctly.