Table 2. Statistics of movie reviews dataset and Amazon reviews datasets.

Dataset	Vocab size	Max length	Min length	Average length
EN-FR	36,598	753	2	34
EN-ES	37,159	630	2	34
EN-DE	47,174	658	2	37
FR-ES	41,163	753	2	30
FR-DE	51,867	753	2	34
ES-DE	51,939	658	2	34
EN-FR-ES	51,939	658	2	34
EN-FR-DE	55,566	753	2	33
EN-ES-DE	66,399	658	2	35
FR-ES-DE	70,978	753	2	33
Movie reviews	103,752	4,589	1	190