According to Wikipedia,
Slovio (from the Slavic word "slovo") is a constructed language begun in 1999 by Mark Hučko. Hučko claims that the language should be relatively easy for non-Slavs to learn as well, as an alternative to languages such as Esperanto which are based more on Latin...
Slovio has a relatively simple grammar based on a mix of Esperanto grammar with Slavic elements. Just like in natural Slavic languages, new words can be formed with a variety of suffixes and prefixes.
I'm not familiar with Slovio or Esperanto at all. How much is Slovio based on Esperanto? Does it just take some parts of the grammar, or does it go to a further extant than that?