Derakun, first line in curly braces on page includes already existing template to page. It is not necessary to delete or translate it. Just leave this line as is. For example, line
adds to page template Template:Constants which adds for all pages Constants/xx language bar and adds pages to categories (for /jp - Japanese and Object Pascal Introduction/jp)
FTurtle 10:18, 8 July 2015 (CEST)
there is a little tip for make your translated pages little better. There are 3 navigation links at the bottom of each page (previous/contents/next). In English pages they refer to English pages. You can make they refer to Japanese pages. For example, in string:
Punctuation_and_Indentation - name of page
previous - text for show on page (may be modified by any way)
So, if you change Punctuation_and_Indentation to Punctuation_and_Indentation/ja this link will refer to your previous page. And so on.
FTurtle 17:52, 26 July 2015 (CEST)