Hey @jsouth,
Eugene from Weglot here.
This is exactly what Weglot is made for 
. Simply connect Weglot to your current Webflow website and that’s it! No need to duplicate your pages and do the work twice. + Weglot is 100% SEO optimized (we create a specific subdomain for each translated language that is automatically detected and indexed by Google).
You can check how to install Weglot on a Webflow website here:
And our support team is always here if you need help → support@weglot.com