Arabic has a reduced set of vowels and, unlike English, in most contexts short vowels are optional.
when Arabic is used as the bridge language the loss of information (in terms of vowels) is large Pair ACC-1 Relative change in ACC-1 Hin-Eng 0.422 Hin-Ara-Eng 0.155 -64.28% Table 6: Incorrect choice of bridge language and the second stage system has no possibility of recovering from such a loss.