[2] Vandewalle first became interested in Turkish at the age of thirteen, during a family holiday to Turkey.
[3][4] He initially studied civil engineering and architecture, before deciding to focus on languages.
[2][4] In 1987, at the age of twenty-six, he won the Polyglot of Flanders/Babel Prize, after demonstrating communicative competence in nineteen languages (Arabic, Azerbaijani, Bashkir, Dutch, English, French, German, Italian, Kyrgyz, Persian, Russian, Swahili, Tajik, Tatar, Turkish, Turkmen, Tuvan, Uyghur, and Uzbek).
[6] In 1993, together with his wife, Linda Gezels, he founded Orientaal vzw, a centre dedicated to the teaching of Oriental languages and cultures.
[7] He has been awarded several prizes for his work in relation to the Turkish language, including the Türkçe Öğretiminde Başarı Ödülü in 1990 and the Ali Şir Nevai Türk Diline Hizmet Ödülü in 2005.