Board Thread:Support Requests - Getting Technical/@comment-35896583-20180704121512/@comment-1038387-20180704183939

"International extension" isn't really a thing because in terms of MediaWiki software, extension has a specific meaning. What (we think) you're talking about it called an International Version.

Start a new wiki with these instructions, and select the language.

Then, ask for interwiki links to link your wiki to the English one. For shared images, read the help page I linked earlier.

If you have problems understanding the help pages, check the top right corner, where you can select a Portuguese translation on most Help pages.