I have a single WordPress installation & I want to activate Multisite with subdirectory (to translate in a second language). Page are ranking well & getting quite a few visit a month.
When I try to activate Multisite network, I have a warning that basically say "main website installed in a subdirectory will have a custom permalink structure, which might broke some existing link" (I'm translating from french..)
I guess that's because of the slug /blog that is automatically added to the existing site permalink ? How can I enable Multisite without loosing all my Pagerank on the existing site ?