UPDATE: Success!!!
FYI -
Not wanting to give up, I used Total Multiserver to flash phone (previous flash was with DaVinci) using the package
2006-05-01 - W810_R4CK003_RED_CID49
This included two files:
W810_R4CK003_ZONE_3_CHINA-APAC-THAI.81S
W810_R4CK003_APAC_EN_ID_MS_TL_VI_ZS.81D
This returned me back to the original language set, as well as the correct version CXC1250317 used in
SE Asia!!!
Hope this helps anyone else who may need it!