Here are a couple of links to sites that are also available in English.   I see that the museum includes a library where there are resources on language so that might also prove helpful. 

http://www.jct.gr/v2/

http://www.jmth.gr/index.html

And something you might also find interesting is Radio Sefarad. http://www.radiosefarad.com/joomla/    It's aimed mostly at Jewish populations in Spain and Latin America but also ladino-speaking people so you might be able to hear the dialect as well.  More on this station here:  http://www.jct.gr/v2/view.php?id=194