Slabý studied in Prague and Berlin, Slavic, German and Romance philology. In 1914 he settled in Barcelona and translated into Catalan and Spanish is a large number of Slavic authors, texts also English, German and Scandinavian origin, the addition of Spanish and Catalan authors into Czech. Best known as an author is Slabý (together with Rudolf Grossman) of Slabý-Grossmann. Dictionary of Spanish and German language, vol 1: Spanish-German, Leipzig, 1932 (5th edition, Wiesbaden 2001)