Okay, so {net jalchugh} sets a context for the remainder of the sentence. It sets the mood, like a time stamp sets the time setting. The question then arises as to how much staying power this mood anchor gives us. As stated, it works for the rest of the sentence. Would it work for the rest of a paragraph? (Not that we know that Klingons HAVE paragraphs.)

I don't see why not. The phrase establishes a context, in the same way that saying wa'leS establishes a context. Barring any evidence to the contrary, I'd feel perfectly free to use a net jalchugh to establish a context for however long it seems to hold.

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SuStel
http://trimboli.name