"Ukrainian language" was created by bored Russian aristocrat Kotlarevsky in 1798 in his "Eneide" humorous interpretation, burlesque, that used local malorussian dialect and made up words to make more fun. At the end of poem he attached humorous "dictionaly of Ukrainska mova". It was the first time when "Ukrainska mova" was ever mentioned. For the lulz, literally.

Later, after creation of Ukrainian Soviet Socialist Republic as part of USSR in 1922, "Ukrainian language" creation started in full, under the bolshevik program of "ukrainisation". But the creators forget, or just was ignorant that languages is different from each other not only by used wrods, but also by grammar. So today, "Ukrainian language" is still just Russian with as many replaced words as possible to look like another language, but with absolutely identical grammar that reveal reality.

Ukrainian language, as artificially created language is even worse that Klingon, because Klingon at least have its own grammar. It is more like some elven language from some second-rate fantasy series book, made by just replacing words in author native language with made up words or words from another leanguage.

In different parts of Russia you could find different local dialects of Russian language. Even St.Petersburg and Moscow have some local nuances in language. Malorussian one was no different. But only malorussian was used as a base to create artificial language of artificial etnicity.

If you are not aware, after USSR fall there was attemtpts to announce and create "Siberian language", "Kazak language" and few other, pushed by western NGOs, but that project was curtailed, when real Russian kazaks ("kazak" is a volunteer warrion class in Russian society) of Kuban region made pogrom in one of NGO (I don't remember for sure, but it was something like "Open Society") regional HQs after an "educational rally" through Kuban villages with that artificial language propaganda and "Kazaks are not Russians" narrative. I never heard about NGO pogroms in Siberia or European North, but Russian people in that regions are less artistical than Kuban kazaks, so I think they just silently punched the faces of NGOs agitators.