The result of experiments using all five languages as T1, and the remaining four languages as T2 for all of these methods is shown in First, looking at the overall results, we can see that MSCFGs with one of the choices of T2 tends to outperform SCFG for all instances of T1.
the gain for the full MSCFG model is large for the cases where the two target languages are French and Spanish, with en-fr/es achieving a gain of 1.46 BLEU points, and en-es/fr achieving a gain of 0.76 BLEU points over the baseline SCFG.