For that purpose, we mimic the experimental settings of <cite>Artetxe et al. (2019)</cite> , and measure the effect of using different initial systems for warmup: the unsupervised SMT system proposed by <cite>Artetxe et al. (2019)</cite> themselves, supervised NMT and SMT systems trained on both small and large parallel corpora, and a commercial Rule-Based Machine Translation (RBMT) system.