The question about Lusatian culture

[Vlatko Vukovic]

On the Russian wikipedia, it says that ethnic population of Lusatian culture was: proto-Balts and proto-Slavs. Sometimes this Russian wiki is so confused.

https://ru.wikipedia.org/wiki/Лужицкая_культура

First question would be; Who are proto-Balts if they never formed linguistical unity which would not include Slavic (that means, reconstruction of East and West Baltic is leading us to common Balto-Slavic proto language).
Second question is; how proto-Slavs in Lusatian culture if there are also proto-Slavs in Zarubintsy culture? (Or there is actually difference between the word "proto" and Russian word "pra".

Sometimes this Russian sources are not clear and understandable for sure!

[rusich]

proto-Balts the ancestors of the Lithuanians and Latvians

[Vlatko Vukovic]

proto-Balts the ancestors of the Lithuanians and Latvians

So Prussians don't belong to the same linguistical family as Lithuanians and Latvians?

Also how proto-Slavs both in Lusatian, but also Milgorad culture?

[rusich]

Prussians and other too
Milograd culture probably proto-Slavs

[Vlatko Vukovic]

Prussians and other too
Milograd culture probably proto-Slavs

Yes Milograd, but also proto-Slavs in Lusatian culture (at least on Russian wikipedia).