I succeeded using the English index in the array $Listin combination with the cmdlet Set-WinUserLanguageList. It seemed strange to me that I could not just flip the steps using the method $list.remove("lt-LT"), since it returns False, so I decided to recreate the list in a different way.
, "lt-LT", , , :
$list = Get-WinUserLanguageList
. $list[0]
LanguageTag : en-US
Autonym : English (United States)
EnglishName : English
LocalizedName : English (United States)
ScriptName : Latin script
InputMethodTips : {0409:00000409}
Spellchecking : True
Handwriting : False
$list[1]
LanguageTag : lt
Autonym : lietuvių
EnglishName : Lithuanian
LocalizedName : Lithuanian
ScriptName : Latin script
InputMethodTips : {0427:00010427}
Spellchecking : True
Handwriting : False
, , Set-WinUserLanguageList . , .
Set-WinUserLanguageList $($list[0])
Get-WinUserLanguageList