All parameters of the baseline BLI models (i.e., topic models and their settings, the number of dimensions K, feature pruning values, window size) are set to their optimal values according to suggestions in prior work (Steyvers and Griffiths, 2007; Vulić and Moens, 2013a;<cite> Vulić and Moens, 2013b</cite>; Kiela and Clark, 2014) .