What language do European pornstars speak to one another in?

[paulyshoresituation]

Always curious about this with European pornstars. Lucy Lee is czech and Angel Dark is slovakian. Most european pornstars seem to be czech, hungarian, russian etc. Now many of them speak english but many don't speak it that well. Now behind the scenes, do these girls speak to their fellow female and male pornstar co workers in czech or european language or do they speak in english?