It seems this issue you raise has been discussed in How should we handle the different traditions of Buddhism in our answers?.
I believe the current way of dealing with answers with unclear "affiliation" is that stating them is not required. But they can be encouraged, just asking the author of the answer about it in a comment as in "Hi, could you please tell me from what tradition this answer is given? Thank you!".
We can discuss this further, if we find the current way of dealing with this is unsatisfactory.
Now, here's why I think distinguishing between dialect as a way to distinguish views is not good.
I think it's unfair to expect people answering questions that they should know not only that there are variations on vocabulary, but to find out what the associations with the sect are. Another problem is these associations don't exist: one could infer from a pali canon quote that the answer is given from the theravada perspective. But, say, a quote from a sanskrit sutra says absolutely nothing about the sect: as it's well known, there are sutras in sanskrit with parallels in pali. Something similar can be said about quotes from, say, the chinese canon.
The matter is even worse for personal views, which seems to be the actual point of this issue: pick 3 people here quoting the pali canon, and they will likely disagree in how they understand some doctrines.
Finally, here's a pali sutta (MN 139) about this that I personally think it's helpful to reflect on:
“How, bhikkhus, does there come to be insistence on local language and overriding of normal usage? Here, bhikkhus, in different localities they call the same thing a ‘dish’ [pāti], 235 a ‘bowl’ [patta], a ‘vessel’ [vittha], a ‘saucer’ [sarāva], a ‘pan’ [dhāropa], a ‘pot’ [poṇa], a ‘mug’ [hana] or a ‘basin’ [pisīla]. So whatever they call it in such and such a locality, one speaks accordingly, firmly adhering [to that expression] and insisting: ‘Only this is correct; anything else is wrong.’ This is how there comes to be insistence on local language and overriding normal usage.