Original sentence: His work reflects the influence of the numerous scholarly traditions he encountered via this education, and the multiple source languages from which he is able to draw: he learned Greek and Latin at the Gymnasium in Warsaw, encountered German, Czech and francophone approaches to scholarship in Prague and Brussels, and is a fluent native speaker of Ukrainian, Russian, and Polish
Edited sentence: His work reflects the influence of the numerous scholarly traditions he encountered via this education, and the multiple source languages from which he is able to draw: he learned Greek and Latin at the Gymnasium in Warsaw, encountered German, Czech and francophone approaches to scholarship in Prague and Brussels, and is a fluent native speaker of Ukrainian, Russian, Polish, German and Greek