w595 add language

[petrovp]

Good day,

I am trying to add a new language (russian) to my W595(RED52).
I uploaded the RU.LNG and RU.T9 to tpa/preset/system/language.
Then I edited tpa/preset/custom/customize.xml to include the <allowed-language>ru</allowed-language>
But after this the russian language is still not visible in menu.
I suppose that customization settings are in some other file, but in what?
Is there a way to add language to w595 without flashing the MAIN and FS?

Thank you.