The magnetic paper certificate clearly has header word "Rzeczpospolita". It is a word exclusive to Polish language, it definitely does not exist in Czech language (where the action takes place) nor any other language for that matter.
In order to execute a mission in Czechoslovakia (according to the map the IMF team is studying), all the team members must speak Czech language not just fluently, but indistinguishably from native speakers. Nevertheless Mr. Briggs reads the name of a town Budejovice as Boo-de-jo-vich, a very clumsy rendering betraying an English-only speaker. The correct pronunciation is Boo-de-yo-vee-tse in official language or Boo-de-yee-tse in folk speak.
Just before a commercial break, the image freezes on Martin Landau grabbing onto a chain-link fence. After the break, Landau's stunt double is in his place. The image is still frozen, giving us a clear view of the double's face.