JEM itself does not comply with the Joomla multilingual language feature, but it is not complicated to use JEM categories as language filter option. I just took a top level category for English, Spanish, German, French and Greek. Then you display the lists by categories. (if needed create subcategories under the language categories).
And concerning the venues as jojo12 mentioned: you can also create a venue "Berlin, Grüner Salon" in German and one "Berlin, Green Salon" in English …
It needs some concentration to figure out the exact information and displaying architecture, but it works fine.
JEM 2.2.3 / JEM 2.2.3 with core mods (custom fields) / 2.3dev (Egnarts Version)
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