Approach for pages that do not exist

[bjohansebas]

I open this issue to see if everyone or the majority agrees on redirecting the links of the pages that do not exist to English, as done in #1685. I'm asking this before launching that PR

[chrisdel101]

I like having an approach. My personal opinion is that English links should not be in other languages since it's hard to get back to the language (have to use back button). BUT I'm okay with this (English links) if that's the consensus. Better to be consistent :)
(And English is better than broken)