Multilingual Dynamic Topic Model

Dynamic topic models (DTMs) capture the evolution of topics and trends in time series data.
Current DTMs are applicable only to monolingual datasets. In this paper we present the multilingual
dynamic topic model (ML-DTM), a novel topic model that combines DTM with an existing multilingual
topic modeling method to capture crosslingual topics that evolve across time. We present
results of this model on a parallel German-English corpus of news articles and a comparable corpus
of Finnish and Swedish news articles. We demonstrate the capability of ML-DTM to track significant
events related to a topic and show that it finds distinct topics and performs as well as existing
multilingual topic models in aligning cross-lingual topics.