/usr/share/dbus-1/system-services/com.ubuntu.LanguageSelector.service is in language-selector-common 0.79.4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | [D-BUS Service]
Name=com.ubuntu.LanguageSelector
Exec=/usr/lib/language-selector/ls-dbus-backend
User=root
|