PreferredEditingLanguage and PreviousPreferredEditingLanguage
Unlike InstallLanguage, the data type of these two values is REG_SZ.
The following script changes what in
Excel can be changed under File -> Options -> Languages -> Choose Editing Language
$office_version = '16.0'
$newPrefEditLang = 'en-US'
# $regKey =
$regPath = "HKCU:\Software\Microsoft\Office\$($office_version)\Common\LanguageResources"
$regKey = get-itemProperty -path $regPath
$prevPrefEditLang = $regKey.PreferredEditingLanguage
$eatMe = new-itemProperty -path $regPath -name PreferredEditingLanguage -propertyType string -value $newPrefEditLang -force
$eatMe = new-itemProperty -path $regPath -name PreviousPreferredEditingLanguage -propertyType string -value $prevPrefEditLang -force