Oddbean new post about login | logout Doesn't seem like it would help with something like Russian, maybe Spanish or European languages though, I could see that.
There was a language called Slovio. Literally Esperanto with Eastern European languages.
I've never heard of it, I'll give it a look out of curiosity
After looking at it Slovio makes sense. It seems like an easier way for even a non slav to get into slavic languages as well. Pretty cool honestly.