Oh! well thanks, i’ll try my best.
What i’m trying to achieve is removing part of the url site wise :
Like in this guide, for :
…/content/blog/page/page.txt
into
…/content/page/page.txt
But also for url structures like this :
…/content/blog/subdir/page/page.txt
This is something discussed in this post : Omitting parts of URLs, the route here comes from one of the replies, seems it wasn’t the proper way 
.
And also here, (sorry for the duplicate now) : Help using routes on subpage