You know the "g *search term*" to search *search term* on Google, and same for Wikipedia etc.?
I use them all the time, and I have added a couple of my own, and decided to share a little tutorial on how to get started on making them yourself.
I will be using a different language Wikipedia (finnish as I am finnish) search as an example, as it is simple and gives you the idea of what we're doing here.
Step 1: Explore the site you're adding
In this case we're going to the finnish Wikipedia's main page. Then you need to think how you are going to use the search engine once we've set it up. Wikipedia is pretty simple, and there is really just one way to use it, and that is to read articles.
So go to any article on Wikipedia and copy the whole address on notepad or something.