If I do this users who share their nl url with someone from en the en user
will visit the wrong page.
I think this is true for any page, correct? If I as a Dutch user visit your site and up tweeting a link, my Twitter followers will end up on a Dutch page. Correct?
I'd lean towards using a URL parameter even though Google recommends against it. The cons they explain don't include bad SEO ranking as far as I can tell. Personally, I could live with the cons. Also, since your site doesn't seem to be content-heavy and the language setting tends to refer mostly to user interface elements (I think?) I don't think it's much of an issue anyway.
I also recommend looking at how other sites have solved this. Specifically those that have a similar setup as yours. (user generated content, etc)
Currently I'm working on a v2 of sayhi.dog and it includes breed pages where a lot of content has been created (by the community). So it will be content heavy and those pages are going to be very different for several languages. It's a difficult decision but I will do some more research.
I think this is true for any page, correct? If I as a Dutch user visit your site and up tweeting a link, my Twitter followers will end up on a Dutch page. Correct?
I'd lean towards using a URL parameter even though Google recommends against it. The cons they explain don't include bad SEO ranking as far as I can tell. Personally, I could live with the cons. Also, since your site doesn't seem to be content-heavy and the language setting tends to refer mostly to user interface elements (I think?) I don't think it's much of an issue anyway.
I also recommend looking at how other sites have solved this. Specifically those that have a similar setup as yours. (user generated content, etc)
Currently I'm working on a v2 of sayhi.dog and it includes breed pages where a lot of content has been created (by the community). So it will be content heavy and those pages are going to be very different for several languages. It's a difficult decision but I will do some more research.
Thanks for answering Marc!