For me (Polish) it is very understandable, but if I were to say what it seems like - I would say that it is like Slovak/Czech with some Russian (mostly verbs).

For me (Polish) it is very understandable, but if I were to say what it seems like - I would say that it is like Slovak/Czech with some Russian (mostly verbs). However, these are the three slavic languages I had most contact with. I can speak some Russian and I can recognize Slovak and Czech (but I wouldn't be able to tell one from the other). And I guess this might be similar for other slavic HN readers - they might speak one or two extra languages, they might have had contact with two or three more. This means that similarities described here ("sounds like ...") will be greatly influenced by the level of contact between nations.