Intercultural competence
Social key competence for behaving and acting in an adequate way in situations when dealing with representatives with different cultural backgrounds.

Foreign language competence Key competence for successful communication with persons who have a different cultural background

from Greek ιδιοσυγκρασία, idiosunkrasia, "a peculiar temperament", "habit of body" (idios "one's own" and syn-krasis "mixture"). It is defined as an individualizing quality or characteristic of a person or group.
(source http://en.wikipedia.org/wiki/Idiosyncrasy)