When exporting a graph containing ISO-1 characters (like é,è,à ), they are not well-formed. This is happening because no encoding are specified in the header of the HTML file.
Could you support to add encoding to the generated HTML file?
To handle the right encoding in my file, I have added the following line in the HEAD:
<meta http-equiv="Content-Type" content="text/html;charset=ISO-8859-1" />