I currently have a website running under a German domain .de (www.mysite.de)
I'm adding now Internationalization support for English and French languages.
The I18n will be handled by a different URL structure for SEO purpose
www.mysite.de/en will handle english related content
www.mysite.de/fr will handle french related content, and so on
My first question is if from a SEO prospective I should move the German related content under its own path as well (www.mysite.de/de)?
If this is the case, then should I do a 301 Permanent Redirect to the www.mysite.de/de when someone comes to www.mysite.de.
Online I can see different examples.
apple.com for example handles US traffic and apple.com/fr the french one for example.
spotify.com has a 302 Temporary Redirect in place that forwards you to a specific language site like spotify.com/us for US
I know that Google lets you specify somehow the language target associated to a specific URL in your site with something called 'Search Console geotargeting'. This is allowed just for gTLD domains so I can not do it with mine as it uses specific German country domain (.de).
I'm wondering if there is something I would need to configure on Google side using the webmaster tool or if hreflang metatag will be enough to signal that for example all pages under /fr are for French related searches
Proper implementation of hreflang is enough in your case.
My first question is if from a SEO prospective I should move the German related content under its own path as well (www.mysite.de/de)?
Not necessarily. It's a matter of setting correct paths in hreflangs.
I'm wondering if there is something I would need to configure on Google side using the webmaster tool
Just make sure you don't configure your site for german audience only, leave it to international.