Do i need to do a reflash?

[lukey]

method 1:
create a folder where your XS++.exe located

\own_custpack\tpa\preset\custom

download a customize pack of china through internet... put the "Customize.xml" & "preloaded_config.xml" there

connect to the fone, choose your K810 and CDA region "china", dont upload the links

method 2:
like letmein said

search a zs.lng for your K810 and the exact version, upload to mobile tpa\preset\system\language

search a Customize.xml for your K810, open it by windows note book

some place might look like this:
<allowed-language>en</allowed-language>
<allowed-language>zh</allowed-language>

add a line after it, like:
<allowed-language>en</allowed-language>
<allowed-language>zh</allowed-language>
<allowed-language>zs</allowed-language>

upload the "Customize.xml" to \tpa\preset\custom

restart your fone

add a language might be dangerous because you havent change the fonts, somebody said when choose the new language, mobile crashed!...reflash might be more safe, but you don wanna do tat...haha