Hi Sitanshu,
i agree with Dhanesh and Shrini.
in SAP you can choose and use the language you or your client requested. but the SPL Data is provided in English Language only.
so, as suggested by Dhanesh, if you need to screen only few BPs in Chinese then contact your Data Provider to screen those BPs in Chinese language . if all the BPs exist in GTS need to be screened in Chinese language using TREX, then the SPL Delta files you need to request in Chinese (if possible) to meet your requirement.
Thanks,
Srinivas Yellampalli