Hello,
I started the trial with build 2060 and saw a fix related to languages in build 2080 so I upgraded, recaptured the image and recreated the WDS boot image and I still have the same issue.
Here are the relevant tasks I run:
<task>
<phase>FIRSTBOOT</phase>
<command>C:\Windows\System32\lpksetup.exe /i fr-FR en-GB en-US /r /s /p C:\Template\LP</command>
</task>
<task>
<phase>FIRSTBOOT</phase>
<command>C:\Windows\System32\reg.exe import C:\Template\International.reg</command>
</task>
<task>
<phase>FIRSTBOOT</phase>
<command>C:\Windows\System32\reg.exe import C:\Template\Keyboard.reg</command>
</task>
I copied the language packs in C:\Template\LP and the 2 registry files are attached to this post. I'm not sure if this is relevant, but the unattend.xml file in C:\Windows\Panther is showing en-US as the InputLocale, SystemLocale, UILanguage and UserLocale.
International.reg
Keyboard.reg