This is ridiculous. I mean that when searching by tags in (at least) non-Latin WP you get the results from the categories.
The biggest example. I have some 1300 posts in my blog and the majority of those are tagged (among other things) with the name of my city - Samara or rather in Russian - Самара. But if you open WP search by tags and print Самара there you won't get about 1200 posts with this tag (remember, you searched by tags and Самара is a tag). You'll only get a couple of posts that obviously had Самара as a category.
What's the reason? Why does WP confuse tags and categories in a lot of non-Russian instances. On the other hand, the search reasults on say Шереметьево (one of Moscow's airports and again a tag in my blog) turns out results by tags. Where's the logic? But if I search by my tag Delta Air Lines I somehow get only results from the Russian WP and (if I am not mistaken) only categories again.
It is high time WP team concentrate on bringing logic to search. People should get search results in tags (not categories) when they click on tags in blogs. And people should be able to specify (by maybe choosing from two options in search results) if they need to further bring same-tag results from all over the WP, or stay fine with only the same language domain.
The blog I need help with is samaralife.wordpress.com.