if you wont support with localization, contact me in 
https://discord.gg/szrveu5hDc - Priority
https://vk.com/mwo_rus    - Alternate
https://www.nexusmods.com/users/138932798
z-MultiLanguageLocalization.pak - zip archive with store(0)

Read Priority in pak archive: file named A_TheRealLoc.xml is read in priority to memory 
than TheRealLoc.xml (all values that are not in the main .xml file will be read from another xml. file)
File zz_sound.pak is read in priority to memory than z_sound.pak

Then you activate own localization game engine search all names which you specified in the localization startup var of "language="
Example: MWOClient.exe +g_language=english  (english - this is var)
Engine search folders, vars, links with name "english"

Search BB and CommandWheel Sounds spanish localization as an example
These are files: BitchinBetty-spanish.xml and CommandWheel-spanish.xml 

to run the game on cryengine engine in any language you need to add a command to the running file MWOClient.exe
command +g_language=russian, you will get the following:
MWOClient.exe +g_language=russian 
MWOClient.exe +g_language=english 
MWOClient.exe +g_language=german 
MWOClient.exe +g_language=french 
MWOClient.exe +g_language=spanish
MWOClient.exe  +g_language=korean
MWOClient.exe  +g_language=japanese

MWOClient.exe* is the game itself, which we run every time we want to play Mechwarrior Online.
it doesn't violate the CoC

Alternate variant:
simply create a file game.cfg in the Game folder of the Mechwarrior Online root package, write a line in it specifying the language to run:
g_language=russian
g_language=english
g_language=german 
g_language=french 
g_language=spanish
g_language=korean
g_language=japanese
Instead of russian substitute any other language, you can write english - the game will start and will search for the specified localization, if it is available.
The Code of Conduct says you can change the game.cfg file.
The file can be located in two places:
in the Mechwarrior Online\game\game.cfg folder.
and in your Windows MWO game profile folder on your C: drive - Saved Games\MechWarrior Online\game.cfg