Thanks, but that only answers the content issue. The reason for posting the comment here was to understand whether Opera was flagging a false positive (i.e. is there a bug in Opera malware protection) or whether Google is adding malware when it translates the page. I would still be interested in any comments from Opera developers who could explain what is happening.
Incidentally I just had the same problem with a spanish language wikipedia page. The Wikipedia page opens normally but the google translated version of the page flags is blocked by opera at first opening. I can by-pass the block if I accept the risk, but I'd rather not do that at this point. It seems that this is not something specific to the Finnish web site but something connected to Google Translate. Has someone falsely flagged Google Translate as dodgy website? That was my first thought. But then I noticed that I can at least open Google Translate if I navigate to that web page. I used Opera's web search engine to get to the google translated version of these web pages. I added googletranslate as a web search engine and assigned it the three letter code gtx. When I was at the web page I want translated I preceded I go to the address field in Opera and precede the web address with gtx followed by space and then ENTER. I have used this facility for years to translate web pages and it has never thrown up a problem until now