I’m considering he possibility of automating/scripting a basic WP install. Part of it will include downloading the latest WordPress version.
The en-us version can be obtained by downloading http://wordpress.org/latest.zip (or tar.gz), is there any way to get an always up-to-date file URL for other languages?
Can you include WP-CLI in your script? Then it could be as easy as:
wp core config --dbname=wordpress_default --locale="<your locale>" --dbuser=sqluser --dbpass=sqlpass --quiet
wp core install --url=local.wordpress.dev --quiet --title="Local WordPress Dev" --admin_name=admin --admin_email="admin@local.dev" --admin_password="password"
Docs for wp core config and wp core install