Well, in Prisoner of Conscience, they did have the weapons crates labelled in Russian.
They did forget one law:
Government officials are more stupid than an entire yard of lumber (little known fact: lumber has an IQ of 150

)
Of course, the accents thing is common on TV and in movies: we're supposed to assume that the non-English speaking characters talk to each other in their own languages, and we get to eavesdrop with our own babelfish.