Import Translation takes a PO or CSV file and loads the translation strings into the ir.translation table.

The web client feature asks for the language name, but this is not used in the import process. It also has an overwrite option. If selected, it forces all the translations, strings to be imported, even the ones that already exist, overwriting them in the process.

On the command line, the import can be done using the --i18n-import option. It must be provided with the path to the file, relative to an addons path directory; -d and --language (or -l) are mandatory. Overwriting can also be achieved by adding the
--i18n-overwrite option to the command. Note that we didn't use the
--stop-after-init option. It is not needed, since the import action stops the server when it finishes.