How can one add the latest information on Pro Evolution Soccer Wiki page?

There are a multiple number of Pro Evolution Soccer Wikis available on the internet and as you did not mention a specific one, I am assuming you were talking about the Wikipedia page. Editing the Wikipedia pages are quite easy, given that the pages are not locked. Look for a padlock icon on the top of the page as it represents a locked page which is not available for editing. The other pages without the specific icon can be edited by anyone. To edit a portion of a page, just click on the 'Edit' link on the right side of each section and it will lead you to a new page with a text box that also has the existing information inside, ready for editing. You can make the necessary changes in the box, as you like. After editing is done, you can either preview the changes or directly publish the page. I think it is better to see the changes you have made and review them for any errors that might exist there. Once you are sure that the changes are final and ready to be made live, just hit the publish button and you are done, your updates should reflect on the original Wikipedia page. You can also create a user account there, so that all the changes or the pages you create in Wikipedia can be managed from a central and organized location, but account creation is not a compulsory step.