If you want to create a multi-language OP2 site, then please try
Transposh, a free localization WP plugin.
To integrate the translation bar to your OP2 page, please go to the Live Editor of the specific page >> Add Element >> Custom HTML/Shortcode element >> insert this code below:
[tp widget="flags/tpw_flags_css.php"]
Save when done. Go to the front end and you’ll see a drop down to select the language of your choice. Just localize the texts at the front end and update.