10. A method as recited in claim 8 , further comprising inferring a plurality of universal topics from the concept-unit, each of the universal topics of the plurality of universal topics being defined by a plurality of topic word distributions corresponding respectively to the different languages, and wherein the inferring the universal topic distribution comprises performing a latent Dirichlet allocation analysis while constraining the set of documents within the concept-unit to share a common topic distribution.
10. A method as recited in claim 8 , further comprising inferring a plurality of universal topics from the concept-unit, each of the universal topics of the plurality of universal topics being defined by a plurality of topic word distributions corresponding respectively to the different languages, and wherein the inferring the universal topic distribution comprises performing a latent Dirichlet allocation analysis while constraining the set of documents within the concept-unit to share a common topic distribution. 15. A method as recited in claim 10 , wherein the inferring a plurality of universal topics comprises performing a latent Dirichlet allocation analysis.