The complex. The empire of whom.

Belarusian language it every before Russian appeared))
The entire Russian language is the Slavic-Tatar Surzhik, well diluted by French, German and English transformers)) it is by this that the Polish, Belarusian and Ukrainian will speak each in their own language and understand each other, and you are not. This is why it is so important for you to humiliate all other languages, otherwise the empire will collapse immediately.)

First, there is no Russian language. He is Russian.
Second, the modern Belarusian appeared later than the Russian. In fact, ancient Russian, although it is ancient, but Russian. Several languages grew out of it. And if there are no old-Russian questions, it is also, although old-Russian, then the language of VKL is still unclear, whether old-Belarus, old-Ukrainian, or Western-Russian. I will imperially nobly refuse western-Russian, but as long as you and the chokhlam do not understand whether it was Belarusian or Ukrainian, it cannot be considered Belarusian. And only from it grew up a modern and independent Belarusian.
A large number of borrowings in Russian only indicate that the language is alive and used. There is no borrowing in dead languages.
Study history and linguistics in this way, and don’t drop it all on mythical imperial complexes. There are no empires complexes. Apart from missiles.