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Hey there–assuming you've correctly implemented your hreflang tags (as alternate inks in your head codes, see example below) then Googlebot should not see these as duplicates of each other. It's hard for me to weigh in on the other element of your question, "my blog structure is not standardized," without examples. How are you differentiating your international content in your URL structures? Another question: are these blog articles actually localized? Meaning, is there custom content (e.g. events in X location) or differences (e.g. spelling conventions) for these regions? If not, you may not even need these international versions of your blog content if it's not being translated.

Either way, switching canonicals from one to another, it will do no good in terms of equity or in terms of spamminess. If you have hreflangs done, then you should be good.

There's a few things you need to marry up if you want to do this. You need the referring page or domain / hostname (to validate that the session came from a backlink you know about). Once you filter the data down like that, you just need to filter by user-agent ("googlebot" - or any user-agent string which contains "googlebot"). Then you just want to look at the IP address field in the tabular data and you have your answers! Here's the problem, most IP-level data is contained within basic server-side analysis packages (like AWStats which is installed on most sites, within the cPanel) or alternatively you can go to the log files for much of the same data. Most referrer-level data (stuff that deals with attribution) is contained within Analytics suites like Adobe Omniture or Google Analytics. In GA, you can't usually get to 'individual' IP-level data. There used to be a URL hack to force it to render, but it was killed off (and many people who used it were banned by Google). The reason for that is, Google don't want too much PID (Personally Identifiable Data) harvested by their tool. It creates too many legal issues for Google (and also, whomever is leveraging that data for potentially nefarious marketing purposes) Since you won't get enough IP-level data from GA, you're going to have to go to log files and log analysis tools instead. Hopefully they will contain at least some referral level data... The issue is, getting all the pieces you want to align in a legally compliant way Obviously you have your reasons for looking. I'd check if you can find anything on your CPanel in AWStats (if that's installed) or get the log files and analyse them with something like Screaming Frog Log File Analyser I can't promise this will return the data you want, but it's probably your only hope