The EU said Thursday it expects world leaders to use "appropriate language", after Serbia's President Aleksandar Vucic was caught on camera joking about the bloc's diplomatic chief Federica Mogherini kissing the Kosovo president.
As Mogherini greeted Balkan leaders before a working dinner in Brussels on Tuesday, she gave Kosovo President Hashim Thaci the customary kiss on each cheek, prompting Vucic to quip in Serbian: "Hashim, Federica likes to kiss you the most."
But she added: "We always expect every leader in the world to use appropriate language, as we do in return."
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