In the 21st century, globalization and technological developments in different domains of life have accentuated the importance of multilingualism and multiculturalism in studying English and French as foreign languages in different countries of the world, including Turkey. This research is aimed at determining the effects of learning vocabulary in French as a foreign language (FFL) through internet-based study. This study used a mixed-method (quantitative and qualitative) approach. In the 2016-2017 academic year, 85 Turkish university students (in 20-23 ages) participated in this study. A vocabulary test and a semi-prepared interview form are prepared to collect the data for this research. In this study, Turkish university students studying vocabulary using internet-based research justify their ability to improve French language knowledge easily and efficiently.