Russian language in Dahua NVR 4416 - unpacking firmware

I rcvd Dahua NVR 4416 in English.

I need to make it Russian.

usings ubuntu 16.10 as virtual machine.

Unziping current firmware

DH_NVR4xxx_Eng_P_V3.201.0000.1.R.20160409.bin

https://cloud.mail.ru/public/N63A/oe5BPRqYB

we have files:

-rwxrwxrwx  1 adminka adminka     8908 апр  9  2016 Install.lua
-rwxrwxrwx  1 adminka adminka    36928 май 31 21:59 logo-x.cramfs.img
-rwxrwxrwx  1 adminka adminka 12877888 окт 22 12:19 romfs-x.cramfs.img
-rwxrwxrwx  1 adminka adminka   259076 май 31 21:59 u-boot.bin.img
-rwxrwxrwx  1 adminka adminka  1568832 май 31 21:59 web-x.cramfs.img

Install.lua is a installing script which says how to flash images inside bin firmware.

romfs-x - is a image which contains linux OS

no we have squashed cram filesystem images, turning them into real files:

first removing first 64bit of the files

# dd bs=1 skip=64 if=romfs-x.cramfs.img of=romfs-x.cramfs

now unsquashing them:

(if dont have unsquashfs just "apt-get install" them in ubuntu)

sudo mkdir romfs
sudo unsquashfs -f -d ./romfs romfs-x.cramfs

now we have

$ ls -la
drwxrwxrwx 20 root    root    4096 ноя  3 15:37 .
drwxr-xr-x  6 adminka adminka 4096 ноя  7 10:04 ..
drwxrwxrwx  2 root    root    4096 янв  3  2014 bin
drwxrwxrwx  2 root    root    4096 сен  6  2012 boot
drwxr-xr-x  2 adminka adminka 4096 ноя  3 15:38 custom
drwxrwxrwx  2 root    root    4096 сен  4  2012 dev
drwxrwxrwx  6 root    root    4096 дек 18  2013 etc
drwxrwxrwx  2 root    root    4096 сен  4  2012 home
lrwxrwxrwx  1 root    root       9 ноя  3 15:07 init -> sbin/init
drwxrwxrwx  2 root    root    4096 дек  8  2012 lib
lrwxrwxrwx  1 root    root      11 ноя  3 15:07 linuxrc -> bin/busybox
drwxrwxrwx  8 root    root    4096 сен 11  2012 mnt
drwxrwxrwx  2 root    root    4096 ноя  6  2012 nfs
drwxrwxrwx  3 root    root    4096 янв 31  2013 proc
drwxrwxrwx  2 root    root    4096 дек 18  2013 root
drwxrwxrwx  2 root    root    4096 июл 30  2014 sbin
drwxrwxrwx  2 root    root    4096 ноя  6  2012 share
drwxrwxrwx  2 root    root    4096 апр  9  2016 slave
drwxrwxrwx  2 root    root    4096 сен  4  2012 sys
drwxrwxrwx  2 root    root    4096 сен  4  2012 tmp
drwxrwxrwx  7 root    root    4096 май 31 15:59 usr
drwxrwxrwx  2 root    root    4096 сен  4  2012 var

inside "custom" directory we have

custom$ ls -la
-rw-r--r--  1 adminka adminka 1674 янв  1  1970 custom.lua
-rwxr--r-x  1 adminka adminka 1268 янв  1  1970 ProductDefinition

inside custom.lua script we have different custom parameters for our NVR 4416

local custom =
{
-- All, English, SimpChinese, TradChinese, Italian, Spanish, Japanese, Russian, French, German,Turkey,Hungarian,Finnish,Estonian,
SupportedLanguage = "English",
SupportedLanguageDefault = "English",


DefaultDahuaddns = ".quickddns.com",
DahuaddnsType = "QUICK DDNS",
--All, PAL , NTSC
SupportedVideoStand = "PAL|NTSC",
SupportedVideoStandDefault = "PAL",


ShowLogo = 1,


DefaultNatProxySvrAddr = "www.easy4ipcloud.com",
DefaultNatProxySvrPort = 8800,
DefaultNatProxySvrKey = "YXQ3Mahe-5H-R1Z_",
DefaultCloudDdnsSvrAddr = "www.easy4ip.com",
DefaultCloudDdnsSvrPort = 12366,

MaxStreams = 2,

SupportedSmartIPC = "YES",

DVR_VENDOR_ID = "General",

DefaultClientWebsite = "http://mobile.easy4ipcloud.com/detect/detect.html",

       DefaultIpv6HostIp = "",
DefaultIpv6HostIp0 = "",
DefaultIpv6HostIp1 = "",
DefaultIpv6HostIp2 = "",

   DefaultIpv6Gateway = "",
   DefaultIpv6Gateway0 = "",
   DefaultIpv6Gateway1 = "",
   DefaultIpv6Gateway2 = "",

DefaultIpv6PriFix = 1,
DefaultIpv6PriFix0 = 1,
DefaultIpv6PriFix1 = 1,
DefaultIpv6PriFix2 = 1,

DefaultAutoGet = 0,
DefaultAutoGet0 = 0,
DefaultAutoGet1 = 0,
DefaultAutoGet2 = 0,


DefaultPrimaryDns = "8.8.8.8",
DefaultSecondDns = "8.8.4.4",


DefaultNatProxySvrEnable = 1,
}

and also ProductDefinition file

$ cat ProductDefinition 
{
  "3G" : false,
  "AllLanguages" : [
     "English",
     "SimpChinese",
     "TradChinese",
     "Italian",
     "Spanish",
     "Japanese",
     "Russian",
     "French",
     "German",
     "Portugal",
     "Turkey",
     "Poland",
     "Romanian",
     "Hungarian",
     "Finnish",
     "Estonian",
     "Korean",
     "Farsi",
     "Dansk",
     "Czechish",
     "Bulgaria",
     "Slovakian",
     "Slovenia",
     "Croatian",
     "Dutch",
     "Greek",
     "Ukrainian",
     "Swedish",
     "Serbian",
     "Vietnamese",
     "Lithuanian",
     "Filipino",
     "Arabic",
     "Catalan",
     "Latvian"
  ],
  "DevStringFiles" : [ "StringsCn.txt" ],
  "RemoteDecodeChannels" : 16,
  "RemoteRecordChannels" : 16,
  "Device" : "DVR",
  "Languages" : [ "SimpChinese" , "English" ],
  "DefaultLanguage" : "SimpChinese",
  "MajorVersion" : 3,
  "MaxExtraStream" : 1,
  "MinorVersion" : 0,
  "OEMVersion" : 0,
  "Revision" : 0,
  "TypeVersion" : "R",
  "VSP" : "None",
  "Vendor" : "General",
  "VendorAbbr" : "00",
  "VideoStandards" : [ "PAL", "NTSC" ],
  "WebStringFiles" : [ "webCN.lang" ],
  "webSpec" : "NVR3.200",
  "webSubVer" : "1"

}

Changing evr. to Russian here

SupportedLanguage = "English",

SupportedLanguageDefault = "English",

and here

"DevStringFiles" : [ "StringsCn.txt" ],

to StringsRu.txt

and

"WebStringFiles" : [ "webCN.lang" ],

to webRU.lang

etc etc

now packing evr back

sudo mkcramfs romfs-x romfs-x.cramfs

then making img with adding first 64b block that we removed before

mkimage -A arm -O linux -T ramdisk -n "linux" -e 0x00580000 -a 0x00080000 -d romfs-x.cramfs romfs-x.cramfs.img

last thing packing back firmware

# zip -D -X fupdate.bin *

after flashing this firmware we still see no Russian, but variables in the buttons.

Can somebody share the thoughts or tell solution?