Yes,let XS++ to upgrade your CID51 to CID52 ,another thing - use XS++3.1 Darwin instead XS++3.2 Crystal (3.2 is beta and not safe).For Portuguese language you need to debrand your phone with this 3 files:
MAIN - K610_R1KG001_MAIN_GENERIC_TH_RED52
FS - K610_R1KG001_FS_EUROPE_1_RED52 and
CUSTPACK - HB1-06_Gen_CDA102568_10_R6A_GENERIC_EUROPE_1