Hello!
I noticed that you're using the preferred rank to label surnames with a designation of (multiple languages). I understand why you may choose to do this:
1. Many surnames are international, appearing across multiple countries and languages, and may have different roots.
2. To American bearers of the Kowalski surname, for instance, it feels distinctly American.
3. Some surnames might coincidentally sound the same but have completely different origins. For instance, 'Luty' might seem unmistakably Polish, while also being a Scottish surname with a history in French and old English.
However, assigning the (multiple languages) label priority may not be the best approach, even considering these reasons. It might be more appropriate to reserve the preferred rank for labels that are definitively preferable or to include other native labels when applicable.
Take Q108577691 (Zaworska) as an example. While it sounds Polish, and sources indicate it is indeed Polish; sure, it might be present in other Slavic languages. However, proving that would need a bit more research. Labelling 'Zaworska' as a preferred native label for multiple languages feels a bit weird given the etymology I know of. Plus, in this case, you seem to have cited the Internet Dictionary of Polish Surnames which makes no mention of this surname being present in other languages natively; the etymology is purely Polish in this source and refers to a location in Poland. (I mean to say that this setup may inadvertently suggest that the sources backs up the claim that it's present in multiple languages – and it doesn't).
Also, a quick heads-up: I see that you're using Q118130420 as a source, which is great! However, adding the related info to P973 (described at URL) might be a redundant effort. I'm in the process of setting up authority control for that dictionary, so all the surnames listed on Wikidata from that source would automatically receive an identifier that links directly to the respective page. This should hopefully save you some work. Once the identifier is approved, I'll add it to the relevant items (i.e., arguably there's no point in listing the IDPS in the Described at URL property).
Let me know what you think about all this.