From the technical side, Google would have to translate every article into every major language, and spin all those language variations. Doing this would multiply their storage and processing cost per article/site by several orders of magnitude, and even then it would only catch the relatively few who use Google Translate rather than using any other service or doing it by hand.
Form the practical side, there are are a number of organizations that intentionally produce nearly identical content in multiple languages, often on localized domains, so these would result in a huge number of false positives.
On paper, it is possible, but in practice it would be an immense effort with a relatively trivial reward.