Research design and evidence.svg file with Portuguese (pt) translation added. Also contains original language (en) and previous translations (fr, es). Could not overwrite original file (which would make more sense, as I only added the Portuguese translation) so uploading a new one.
File:Research_design_and_evidence.svg
Author: CFCF (https://commons.wikimedia.org/wiki/User:CFCF)

Portuguese translation added: Fferreira-santos (https://commons.wikimedia.org/wiki/User:Fferreira-santos)