The Bandwidth Drain
When you install Ubuntu, the system is designed to provide comprehensive global support. During the installation and subsequent system updates (via apt update or the graphical Update Manager), Ubuntu often checks for and automatically downloads massive language packs for software you have installed. If you installed LibreOffice, it might download the French, Spanish, and German translation files, even if your system locale is strictly set to US English. This silent background downloading of unnecessary localization files wastes disk space and consumes precious bandwidth, especially on metered connections.
Halting the Localization Downloads
To conserve your bandwidth and stop Ubuntu from automatically downloading unnecessary language packs during system updates, you must configure the APT package manager to ignore translations.
You need to create a custom configuration file for APT. Open your terminal (Ctrl+Alt+T). Type sudo nano /etc/apt/apt.conf.d/99translations and press Enter (you will be prompted for your password). This will open a new, blank text file in the nano editor. Carefully type the following single line of configuration exactly as written: Acquire::Languages "none";. Press Ctrl+O to save the file, hit Enter to confirm the filename, and then press Ctrl+X to exit the editor. The next time you run sudo apt update, the system will completely skip fetching the translation indices, speeding up the update process and preventing the automatic installation of foreign language packs.