How can I apply lang attribute for selected nodes?

[mikkomikko]

I'm adding a possibility to mark text with different languages. The user selects some text, chooses a language from dropdown menu and then a lang attribute with correct value should be applied (I believe) for selected nodes. I can't change the node completely since the html tags need to stay the same. Just add the lang attribute. Another option would be to create a wrapper component for selected nodes but it sounds tricky since it depends by the semantics of selected nodes if the wrapper should be a div or a span. What kind of Lexical concepts should I use here?