Well, if you want to go into linguistic differences, then you have to keep in mind that it's been two thousand years, with Germanic mercenaries as well as the Romans. The Aleran language is not Latin. It wouldn't be 'Latin with mild linguistic changes,' wouldn't be slightly different, it'd be a different language altogether.

That aside, I'm not going to be forgiving, because there's a matter of author intent. He meant to be impressive and know Latin. He failed. Either way, there is linguistic inaccuracy, and that's a charge.

Also: 'quod' is just plain wrong.

I kept looking it up, and consistently found two words for honor: veneratio and, well, honor. With that, it's pretty clear one is a matter of personal code and the other, well, veneration, which is very clearly not the context.

Declension... yeah, I thought about that. Thing is, the words don't exist in a void with the statement. I seriously considered tossing the 'pro' in at the beginning, to punctuate it. Hypothetically nominative is right, but it just isn't a cool list of things. I dropped the 'pro' because it kept changing both ultio(ne/vindicta) to either "the revenge" or "the vengeance of" when I checked the translation against Google (trying to learn Latin grammar on the fly sucks okay). Neither connotation was what I wanted in context, so I went with ablative to preserve that spirit of the implied 'pro' of the intended English.

I'll probably mention both declensions, though, in the comment. Context is, by the way, that the badfic author wrote, "veneratio, licentia, quod ultionis."