If I was Cpt. Hernandez I'd order Graylock to speak proper English.
Proper English? You mean he should talk in the Queens English and sound like he has a silver spoon inserted into his mouth? If so, you're having a giraffe right? There is no such thing as Proper English, as already stated, English is different around the world, there are subtle differences as already stated in previous posts. Hell, English is different around Great Britain itself for example, in Australia a thong is a form of footwear but in England and I believe America it is a form of underwear, As for spunk, in England it means a form of bodily fluid yet in Australia it means that person is fysty and forthright so If Greylock wants to say a word or two in his own native language, then so be it, what he says is far more dipolamtic than what is roughly translates to into English.
Saying that, English has assimilated terms from other European languages throughout time so who is actually to say that Scheisskopf has not gone the same way?
The universial translator tends to be forgetful when it is about non-English swear words and sometimes time and distance but I wondered for a moment after reading this why this remarkable piece of technology was unable to turn this messy version of English into the proper one.
Then I realised that these scenes took place in the past. I am not sure when exactly the universial translator was developed in Enterprise but it seems it was less sophisticated than in "present day" Star Trek.
Yes, there is a difference between native non-English speakers talking to themselves as shown in Stargate Atlantis in Czech and having a conversation during a crisis situation. And even then, as I said, this pick and mix version of English with German (or any other language) is not only unrealistic, it is annoying.
The UT was a work in progress throughout
Enterprise and by
Demons/Terra Prime it seemed pretty reliable.
You are aware that if a person does not speak English (for example) as his or her first language, it times of stress they will more than likely revert to their mother tongue so it is realistic and as for annoying, I find the arrogance that English should be spoken by one and all very annoying!
One of the reasons I love Firefly is the combination of both Manderine (?) and English in the 'Verse because as the world gets smaller, I wouldn't be surprised if the major languages merge into one creating a basic human language.
I just had a quick look on wikipedia and on this page:
http://en.wikipedia.org/wiki/Languages_by_speakers English (in its varied forms) is the third most spoken language in the world and not as some assume the most spoken.