In the build log I see that all pages are generated succesfully but impossible to switch to the right slug

you can do that by entering a list of available language codes. Something like this:

export async function generateStaticParams() {
    return i18n.locales.map((locale) => ({lang: locale}))
}

The output then looks like this: (see attached). As you can see, all routes are built with all configured languages (in my case "en" and "de")

@B33fb0n3 it looks like this on my side:

it's just the problem that on my blog articles it won't change the slug when switching the language

don't you redirect the client to the chosen language code?

Is each blog post route his own database entry or how do you handle it?

@B33fb0n3 I change the language like that: <Link href={/${currentLocale}/about} className="text-gray-700 hover:text-gray-900"> {t('navbar.about')} </Link>

but you (hopefully) also using a middleware, right?

@B33fb0n3 yes, but not sure if that's good like that

And I'm calling an api from strapi for the blog articles

that looks right. You can remove the currentLocale from your routes, because whenever the route changes, the language code will be added though your middleware

So, back to the blog pages:

Is each blog post route his own database entry or how do you handle it?

Maybe my config.ts is wrong?

When I remove the currentLocale and click on "Über uns" for example, it switches directly back to the english locale

Can you try to switch this: (see attached). And also: what kind of options are in localePrefix?

Hm when I switch it to true it's messing up all the /de /fr depending on what link I click

I set localePrefix to "as needed" so when the website opens in the defaultLocale (en) there is no locale in the url

What does messing up mean? Can you give me an example?

ah got it

I'm for example on http://localhost:3000/fr/a-propos then click on the Home button and it goes to http://localhost:3000/de

click on the Home button

and how does the href of this looks like?

<Link href={/}

then that's the correct behaviour 🤔

Ahh, but it should go then to http://localhost:3000/fr/ not http://localhost:3000/

Can I not keep the href={/${currentLocale}/} ?

Uhm ok… how is the current behavior from your blogs and how should it be?

for example the english slug: http://localhost:3000/blog/post/the-evolution-of-modern-websites

then the when I switch do german it doesn't change the slug: http://localhost:3000/de/blog/post/the-evolution-of-modern-websites

it should be: http://localhost:3000/de/blog/post/die-evolution-von-modernen-webseiten

I guess I can't help with next-intl. I haven't used it enought to be able to resolve your issue