Simplify the following text for a Grade 8 native English-speaking person.
Original: His work is often cited as the basis and motive for contemporary patriots and national activists . It has been translated into various Slavic , as well as non-Slavic languages .
Simplified: His work was very important for the patriots and national activists , who lived at the same time as KollÃ r. People translated the book into many Slavic and non-Slavic languages .