[Doaaheyanedude]

Делайте по этой инструкции: Add multilingual support to Windows Setup »

C:\10work\dvd // Распаковка win10pro64.iso
C:\10work\language // Распаковка mu_windows_10_language_pack_version_1607_updated_jul_2016_x86_x64_dvd_9058649.iso
C:\10work\mount\boot

BOOT.WIM
Dism /mount-image /imagefile:C:\10work\dvd\sources\boot.wim /index:2 /mountdir:C:\10work\mount\boot
Dism /image:C:\mount\boot /add-package /packagepath:"C:\Program Files (x86)\Windows Kits\10\Assessment and Deployment Kit\Windows Preinstallation Environment\amd64\WinPE_OCs\en-us\lp.cab"
Dism /image:C:\mount\boot /add-package /packagepath:"C:\Program Files (x86)\Windows Kits\10\Assessment and Deployment Kit\Windows Preinstallation Environment\amd64\WinPE_OCs\en-us\WinPE-Setup_en-us.cab"
Dism /image:C:\mount\boot /add-package /packagepath:"C:\Program Files (x86)\Windows Kits\10\Assessment and Deployment Kit\Windows Preinstallation Environment\amd64\WinPE_OCs\en-us\WinPE-Setup-Client_en-us.cab"

INTSTALL.WIM
Dism /mount-image /imagefile:C:\10work\dvd\sources\install.wim /index:1 /mountdir:C:\10work\mount
Dism /image:C:\mount\windows /add-package /packagepath:C:\10Work\Language\x64\langpacks\Microsoft-Windows-Client-Language-Pack_x64_en-us.cab

xcopy E:\sources\fr-fr C:\my_distribution\sources\fr-fr /cherkyi ?

Dism /image:C:\10Work\Mount\windows /gen-langINI /distribution:C:\10work\dvd
Dism /image:C:\mount\windows /Set-SetupUILang:en-us /distribution:C:\10work\dvd
Xcopy C:\10work\dvd\sources\lang.ini C:\10work\mount\boot\sources\lang.ini
Dism /unmount-image /mountdir:C:\10work\mount\boot /commit
Dism /unmount-image /mountdir:C:\10work\mount\windows /commit

Где знак вопроса вот это не понятно

Это если интегрируешь английский (en-us), то есть нужно скопировать папку из английской версии виндовс ?