Help with Proper Nouns

[inthisgallery]

Hello all - I'm a total newbie here, so please bear with me. heh.

I have a quick question regarding proper nouns.  Do they get translated, or stay untranslated?  I assume they become somehow... phonetically translated.

Perhaps a more specific example:  How would you handle something like "Coca-Cola"? Does that become "qoqa qola"?  Or.. what exactly?  (I'm not entirely sure if it would use q or Q...)

Thanks in advance!

[tesseraktik]

Well, I've seen multiple solutions for this.  For instance, in Qo'noS Qo'noS, one often sees sentences such as

Hilton­Daq "Star Trek: The Experience" wISuchba'.

However, we also know that the starship Enterprise is known as 'entepray', and that Captain Jean-Luc Picard is known to Klingons as janluq pIqarD.

I don't know of any firm rules, and I'm assuming that whichever solution best achieves clarity is the most correct one.  For instance, in English texts about Chinese people, one often sees their names written out in Chinese characters of some dialect, but they also include some sort of pronunciation guide (such as "溫家寶, pronounced Wēn Jiābǎo").
Usually, I would recommend introducing the term you intend to use along with an explanation before you go on to talk about it.

Quwqa' Quwla' tlhutlh Human . vIwaHta' ; tlhorghHa' ! { Humans drink Coca-Cola. I have tried it; it is bland! }

This works as there's no such word in known tlhIngan Hol as Quw(') or quw('), but be careful in case you for instance want to say "Swedish Humans eat nötkaka." (nötkaka being Swedish for nut-cake) that you don't say notqa'qa' Sop SI'verye' Human, as this could be interpreted as "Sweden-Humans eat raven-spirit."  Think of some new name for nötkaka, or describe it properly before you talk about it (tera'ngan naHlet chab 'oH notqa'qa' { "notqa'qa' is Terran nut pie" }.  A poor example, as you'd be better off just calling it naHlet chab and be done with it, but I hope the point comes through.
Also, I'm sure one could somehow use the verb pong to say something like "<off-world species> call this <class of things> <proper noun>", but I'm not sure how.  Also, perhaps one could say HumanvaD pongDaj 'oH Quwqa' Quwla' (For Humans, Coca-Cola is its name) or tera'Daq pongDaj 'oH Quwqa' Quwla' (On Terra, Coca-Cola is its name).