Unsupervised Pivot Translation for Distant Languages
Table 2: The length distribution of the best translation paths. The ratio is calculated based on all language pairs in the test set.
['Length', '[ITALIC] 1-hop', '[ITALIC] 2-hop', '[ITALIC] 3-hop']
The direction translation (1-hop) only takes a ratio of 7.1%, which means that a majority (92.9%) of the distant language pairs need multiple hops to improve the translation accuracy.