As a Technician I frequently install Office 2016 for my customers. Every time I need both English and Greek (or other language) interface, I have to go to the internet, download the web installer and then wait for the language pack to download and install. I was wondering if there is any offline language pack that I can download and install it without need for internet connection and the time necessary to do it online. Searching in Google only points me to the web installers. Any standalone solution?

Thank you in advance.