Template:Translate to Portuguese
This is template which puts a large grey label on the page, suggesting that a portuguese translation would be good. It also puts the page into Category:Translate to Portuguese.
Because the label is quite large and obtrusive, it is only appropriate to place this on pages which are particularly relevant to the portuguese-speaking OSM community, rather than important pages of the OSM wiki in general. For important pages you might place this template on the talk page or just use the category, and not this template.