I'd like to ADD Chinese to my K530i

[GinnCorvus]

You can try this procedure for both languages (caution! this flash a new FS so you lost all data, backup it before continue):
1- download an R8BB001 FS firmware file which contains the French language (use only CID52 firmware files)
2- download the R8BB001 FS firmware file with the prefered chinese lang and the corresponding Custom Pack (use only CID52 firmware files)
3- use babe2raw and sefstool4 to extract the entire fs file with french language
4- locate the fr.lng and fr.t9 file in \TPA\PRESET\SYSTEM\LANGUAGE\ extracted folder
5- Modify (with notepad) the file customize.xml into the zip file Custom Pack dowloaded. You must add this line below to the similar other:

<allowed-language>fr</allowed-language>

6- Now flash your phone: use only FS (china) + CP (modified). You must have already the MAIN_CHINA installated in the phone, so skip main flashing.
7- Upload the files fr.lng and fr.t9 in \TPA\PRESET\SYSTEM\LANGUAGE\ using XS++ or JDFlasher
8- Power on the phone, please waiting message and done ;)