Sentence:  In connection with both are night-schools for adults, which are also largely attended by Arabs, Copts, Jews, Levantines, and Europeans of almost every nationality: the waifs-and-strays of <WSD>Babeldom</WSD> who have no time for school-work by day, but who take industriously to it six evenings a week under the attractions here offered. 
Meaning of the word marked with <WSD> tags:  A multiplicity of mutually unintelligible languages.