Followup to the discussion over at #29 (comment)

What does not work as we had initially discussed is that operations like update automatically work across all plugins/themes and language packs are always downloaded in their latest version, irregardless of what version of the plugin/theme is installed.

Perhaps we can do something here. The relevant code is in \WP_CLI\CommandWithTranslation::update().

This would probably also fix an inconsistency I just noticed when using wp language plugin list --all.

That command showed a few available updates for some plugins for the de_DE locale.

However, when running wp language plugin update --dry-run, only one plugin was listed.