Office 2019 Language Pack Offline Installer Instant

\\server\office2019\base\ (base Office 2019 ISO contents) \\server\office2019\lang\fr-fr\ (French LP) \\server\office2019\lang\de-de\ (German LP)

This still requires a one-time internet download to create the offline source, after which you can deploy offline. office 2019 language pack offline installer