How's the Spanish translation?

Um...not sure. The subtlety is that in verses 2 and 3, the English version gives directions to "yourselves"--you all should be open to God's peace, you all should share God's peace. Part of the reason for that is that English is in general more compact than Spanish in terms of syllable count (at least comparing apples to oranges this way, I'm not sure about all translations), so throwing in an extra word like "yourselves" helps pad out the English lines to match the Spanish ones. The original appears to only be addressed to you-singular.

How does it only "appear," don't you know?

No I don't.

So you're not very good at Spanish then.

Well, probably. But the issue is that the most common form of "you all" that I learned in Spanish class is really only applicable to Spain-Spanish (Castillian), a lot of Latin America doesn't have a strict form for that. But then nobody likes the Spain version because it has extra accent marks even in the present tense, and we all hate accent marks. But then talking with colloquial speakers who know more than me it sounds like some regions Latin America actually do have their own dialects for "you guys" but nobody puts it in textbooks so who knows...Have I had this conversation already? I may need a tag just for this topic...Okay, I've gone back to add the tag to a previous post.