List of steps to reproduce (step by step, including full links if applicable):

• Go to some fawiki page, e.g. https://fa.wikipedia.org/wiki/%D9%85%D8%A7%D9%87 and scroll to the end. The phrase "شرایط استفاده" should be linked to the Terms of Use. Since no Persian (fa) translation exists for the Terms of Use, it links to the English version at https://wikimediafoundation.org/wiki/Terms_of_Use
• Now go to the same page in mobile view,i.e. https://fa.m.wikipedia.org/wiki/%D9%85%D8%A7%D9%87 and click on "شرایط استفاده" at the bottom of the page. It links to the non-existent page https://foundation.wikimedia.org/wiki/Terms_of_Use/fa

What happens?:
User cannot access Terms of Use in mobile view.

What should have happened instead?:
User should have access to Terms of Use. If it is not available in their language, they should be redirected to the fallback version, which is English.

Other information:

In https://foundation.wikimedia.org/wiki/User_talk:Martin_Urbanec_(WMF)#Redirect_request I asked one of the users who has edit access to WMF wiki to implement a quick workaround by creating the /fa page and making it a redirect to the /en page.

Broadly, however, I think we should either not link to non-existent translations (somehow, we manage to do that in the non-mobile view; whatever we do there could be what we do for mobile view too), or we should create all the missing translation pages as redirects to the /en page.

PS: Should WMF Legal be notified about the fact that many users have not been properly linked to the Terms of Use?