This research describes a real-life projects in developing 21st-century skills within the COIL project. The Georgia-Meisei fieldwork, which focuses on marketing a small café, involved students from Meisei University and the British University in Georgia. These students formed groups to develop web-based applications for language learning, communicating and collaborating in English as a Lingua Franca. The project aimed to attract customers using Georgian wine, and after finalizing the web applications, students held a one-week promotional event. The study employs several conceptual frameworks, including English as a Lingua Franca (Firth & Wagner,2007), Translanguaging (Canagarajah, 2012; Garcia & Wei, 2014), and agency (van Lier, 2010), and uses a qualitative methodology to examine students' development of 21st-century skills, including Ways of Thinking, Tools for Working, and Ways of Working, as well as English language learning. This research demonstrates the potential of authentic, real-life projects as a means of fostering skills that are essential for success in the 21st century. The study's findings could be used to inform the development of future curricula and teaching methods aimed at preparing students for the demands of an increasingly globalized and interconnected world.