The aim of this paper is to introduce an effective English language preparation before taking part in Erasmus+ Internships. Firstly, the Erasmus+ project, which has been run at Higher Secondary School for EU Administration in Prague, is briefly described. Secondly, the students and Internship employers’ reflections on the level of needed language, ICT and collaborative skills are presented. To collect qualitative data the methods of questionnaire, focus-group discussions and semi-structured interviews were applied. Finally, the model of English language lessons which effectively prepares students for Erasmus+ Internships with regard to current job market requirements is presented. The English language serves as a tool which enables students to communicate face-to-face in an office environment and both synchronously and asynchronously in an-online environment. Moreover, the English language is used while practising collaborative skills. The simulation of real working situations in both school and online environments might contribute to better relationships between the students and their working colleagues and employers and broaden the students’ working opportunities.