Hi I find it is an old post, but still want to add some comments for future reference.
For SEO purpose, you may use subdomains having both English and Dutch version on the same site, and have your Dutch version under a subdomain(for example, wwww.example.com.nl). Besides, you may use hreflang tags to tell search engine your site structure of targeting multiple regions. You may read the post and find more details: https://geotargetly.com/hreflang-seo-guide-for-multilingual-regional-websites
Additionally, for your multi-regional marketing, to better engage and bring local to visitors immediately, you may auto display correct language for you visitors. Geo Targetly might be the solution. It detects yours visitors’ locations by IP. You can easily set up rules redirecting visitors; each region can associate with individual URL, showing correct language. The service provides intuitive tools with no code required; Webflow is supported.