Actually we have own tags like #polish or #pl-artykuly but they are not showing on left sidebar. What I'm thinking about is another section for tags like you can see on attached image (right sidebar).
That would be helpful for english readers too. For example, let's say You love #football , right now there is no tag #football on left sidebar. So if we had add to favorites button next to tag under the article, you could easily hit that button and tag will go to My Favorite Tags section on right sidebar. Next time you want read about #football, You just click link from right sidebar