An article is automatically added to this tracking category when the article includes {{e09}} or {{ethnologue09}} or when its {{infobox language}} includes |ref=e09. These should be used when data do not appear in later editions (for example, when the date of a citation goes missing), or when Ethn.9 is the earliest edition to have an undated figure.

 Articles with undated figures need to be checked against Ethn.8 to see if they belong in that category instead.