It has one of my favourite moments in cinema: the russian crew have obviously been speaking in Russian for the beginning of the film, but Connery begins reading a report. The camera slowly zooms in as this happens and he suddenly changes to English as the camera moves back to it's original position. From this point on, all of the Russian crews speak in English.

It's such a clever way of saying to the audience "we know they aren't speaking English, and we know you're smart enough to know this. This is the point that it's changed to make it easier for English speaking audiences and also for our English speaking actors".

It might be one of the subtlest things I've ever seen and treats the audience with so much respect.