The 'www.example.com' has been translated in at least one instance to point to a url that is a spam domain, in the file /i18n/jv.json
However, www.example.com is a reserved domain intended for this purpose (as a placeholder) and should not be translated.
All messages should be checked to see if this has happened in any of them and fixed if not (i.e. changed to www.example.com) and a note should be made in /i18n/qqq.json informing translators not to translate this domain name.
More info:
https://www.mediawiki.org/wiki/Localisation
https://www.mediawiki.org/wiki/Localisation_file_format