Interslavic (Medžuslovjansky / Меджусловјанскы) is a pan-Slavic auxiliary language. Its purpose is to facilitate communication between speakers of various Slavic languages, as well as to allow people who do not speak a Slavic language to communicate with Slavic speakers by being mutually intelligible with most, if not all, Slavic languages. For Slavs and non-Slavs, it can fulfill an educational role as well. Interslavic can be classified as a semi-constructed language. It is essentially a modern continuation of Old Church Slavonic, but also draws on the various improvised language forms Slavs have been using for centuries to communicate with Slavs of other nationalities, for example in multi-Slavic environments and on the Internet, providing them with a scientific base. Thus, both grammar and vocabulary are based on the commonalities between the Slavic languages, and non-Slavic elements are avoided. Its main focus lies on instant understandability rather than easy learning, a balance typical for naturalistic (as opposed to schematic) languages. The Interslavic project began in 2006 under the name Slovianski. In 2011, Slovianski underwent a thorough reform and merged with two other projects, with the result called "Interslavic", a name that was first proposed by the Czech Ignác Hošek in 1908. As with the languages of the Slavic language family, Interslavic is generally written using either Latin or Cyrillic letters, or on rare occasions the Glagolitic script. Pan-Slavic language Precursors of Interslavic have a long history and predate constructed languages like Volapük and Esperanto by centuries: the oldest description, written by the Croatian priest Juraj Križanić, goes back to the years 1659–1666. The history of Pan-Slavic language projects is closely connected with Pan-Slavism, an ideology that endeavors cultural and political unification of all Slavs, based on the conception that all Slavic people are part of a single Slavic nation. Along with this belief came also the need for a Slavic umbrella language.