Thanks to the Erasmus+ project, we wanted to allow students to go on an internship in a country of the European Union. This course was intended to enable them to improve their mastery of English, Spanish or Italian depending on the country of destination, to integrate into the local market and to better understand the corresponding cultures. To obtain the BTS Negotiation and Digitalization of Customer Relations, periods of in-company training are mandatory, including a period of 5 to 6 weeks at the end of the first year. The two-month mobility offered by the Erasmus+ programme was entirely in line with this framework of in-company learning.