Double Subverted: ...but the Sixth Ranger is a quarter Cree, the Hero is a Burakumin, etc.
Parodied: They're not only multinational, but every last one is a Captain Ethnic.
Zig Zagged: Originally, there's only members from five countries, but as the series progresses, more and more nations join, until finally every nation and sub-national entity is a member of the Trope Team. However, a Curb-Stomp Battle with the villains kills off most of the members. The nations whose members got killed in the battle replace them.
Averted: The Trope Team are all from one nationality.
Enforced: The producer thinks audiences identify more with characters of their own ethnicity.
Deconstruction: To represent the trouble between countries, the wars between the the member nations are carried over into the Trope Team as squabbles between the members. Manipulative Bitch Alice naturally takes advantage of this by tricking some members into succumbing to Face Heel Turns.
Reconstruction: Those members realize they've been tricked, and join together to fight against Alice.