I suggest doing some research on that part so you understand how it applies. It’s very important if you are making multi language sites.
Same with creating the htaccess entries. Lots of examples online for this stuff.
Oh ok - not sure if I want to do this when it’s difficult with SEO and so on… 
I search the www
Thanks again
Not difficult at all. It’s pretty straight forward. Just need to do some reading on what and how to apply.
I’m just not going to do it all for you 
Not the problem to read it or do it by myself …
but the page is on google first position … and I don´t want to risk that