OK, in other words, starting from EU fw 2.30 you've created a gupdate with
- boot.bin Section=0800 RGN=0C HWID=265 SW=460 (why not 230? may be they are identical?)
- Unknown.bin Section=1105 RGN=11 HWID=N/A SW=N/A (<==== these are the voices, right?)

and now I am going to flash this in a unit having (originally)
- boot.bin Section=0800 RGN=0C HWID=265 SW=450
- fw_all.bin Section=BD02 RGN=0E HWID=265 SW=450

in other words I am only going to write region 11 containing italian voices. And this could be reversible.
Right?

This is only the first step, because to have the multilanguage sw, in a second moment I will must to flash also
- fw_all.bin Section=BD02 RGN=0E HWID=??? SW=260

Do you agree?