Borrowing from @portofacil suggestion. Changing the locale feels clunky. Instead configure wp-cli to install WP 4.8, the pervious WP version.
create a wp-cli config file that will override the wp-cli defaults.
now open the file. (Nano is my preferred text editor)
paste the following and save.
- yaml is whitespace sensitive.... That means indention matter and I prefer spaces. Following my example, make sure there is no space in front of 'core" and two spaces in front of version".
Now run your normal EE commands for WP installation. After it completes simply login and WordPress will notify you an upgrade is available.
Click the link and WP will upgrade without incident.
Eventually this issue will be resolved. When that happens simply delete the config file you created and you will be all set.