As the number of trope examples gains magnitude, the probability of an example entirely in Japanese approaches certainty.
A given trope shall be about Star Trek in some way. The fact that this has nothing to do with the Japanese language is <something about Sulu>. If you can't link it to Star Trek or Doctor Who, Stargate SG-1 will do. The fact that this has even less to do with the Japanese language is <something about island nations> or <something about that monk on Oma Desala's planet>, respectively.
If the trope was ever subverted or lampshaded, the probability that an example from The Simpsons will be posted approaches one exponentially, with exceptions mostly populating the realm of Anime Tropes.
Related to the above, all tropes will have an example from My Little Pony: Friendship Is Magic, regardless of how well it fits. If it is a trope that would never occur in Friendship Is Magic proper (due to not fitting the genre, being inappropriate for the intended demographic, etc.), it will be present in Fan Fiction for the series.
As time passes, the probability of a trope page having an internal link to itself within one of its examples approaches one.
If a video game trope is present in the webcomics, the probability of it being parodied or lampshaded is close to 100%.