Yaalah, My Sultan Wishes you Dead!!!

[bobbin]

They would have spoken a Iranian language not Iranian, ie English is a germanic language but its not german.

Don't think they would have been influence much by chinese as to the east of them were the Yeuzhi (who as Meinpanzer said might have spoken an Iranian language) and then the poweful Xionghu who might have spoken a Yeniseian, Turkic, or Iranian language.
The chinese were pretty much confined to china at that point and it would be a while before they reached what they called "the western regions" (central asia)

[MeinPanzer]

Don't think they would have been influence much by chinese as to the east of them were the Yeuzhi (who as Meinpanzer said might have spoken an Iranian language) and then the poweful Xionghu who might have spoken a Yeniseian, Turkic, or Iranian language.
The chinese were pretty much confined to china at that point and it would be a while before they reached what they called "the western regions" (central asia)

Bobbin is exactly right here, but one point should also be added. Rather than Chinese influence on the language of the Rouzhi, who likely spoke an Iranian tongue, there is actually evidence of Indo-European influence in Chinese in some very limited vocabulary which could likely be traced back to the Rouzhi or, much less likelier, the Xiongnu (Otto Maenchen-Helfen was, IIRC, the first to identify this).