Thanks for posting your thoughts, IilahDovah. It's certainly an interesting discussion, and there are bound to be strong feelings on the topic.
Thuum.org has three goals - to document the language, to expand it, and to teach it. This first part is the most important; to study the language as it's presented in-game and describe it. This includes things we may not like or agree with. For example, nok meaning both separate senses of "lie" or Alduin's sometimes peculiar pronunciations. Canon is important because it's the part of the language that everyone will know outside of this site.
Canon serves as the foundation for the second part. We have certainly spent a lot of time with the language, but we still make mistakes. The fact that the word revision thread is now almost 1,000 posts long is evidence of that. In my opinion, we should have waited on expanding the language until we understood it better. That's entirely on me.
Start fiddling with the canon, and then it's no longer Bethesda's dragon language. At that point it's something else.
When it comes to teaching the language, though, we can be selective. I don't have Alduin's pronunciations described in the lessons because they're atypical. I don't teach spelling variations for certain words because they're probably typos on Bethesda's part. We could teach everyone to use praan "rest" instead of nok "lie" so there are two distinct words for both senses of "lie."
Our goals of describing the language and expanding the language may sometimes conflict, but the canon will always remain. It can't change, but our perspective on it can.