Singing and dancing help a lot in overcoming language barriers and connecting with each other.
Few things are needed to initiate the movement. Just give participants free access to:

• some acoustic music instruments (guitars, flutes, tambourines…);
• lyrics books with tablatures;
• a white board (to write additional songs);
• a computer or a smart phone with an efficient sound system;
• playlists with music from various cultural areas.

If needed, give the first impetus at the beginning of the training course.
Spontaneous jam-sessions and dances will most probably occur in the following days, contributing strongly to the group dynamic.