However, the need for a common language of communication for Slavs was still felt, and due to the influence of constructed languages like Esperanto, efforts were made to create a language that was no longer supposed to replace the individual Slavic languages, but to serve as an additional second language for pan-Slavic communication.

In the same period, the nexus of pan-Slavic activity shifted to the North, especially to the Czech lands. In 1907 the Czech dialectologist Ignác Hosek