Translator's note - what's the convention?

Viktoria Gimbe wrote:

I am working on the translation of an environmental assessment, from English to French. I have come across a paragraph where a regulation is quoted. However, since this is a provincial regulation of English only Newfoundland and Labrador, there is no official French translation for it. Now, I think the best solution is to translate the quote to the best of my knowledge. However, I want to make sure that the reader understands that this is my own translation and that they should refer to the original English text of the regulation. I think a translator's note is in order. The only problem is that I have never added a translator's note before (it feels strange that I never felt the need).

Can you please explain what the convention is for translator's notes? I know that square brackets are usually used, but I also wonder if there is a standard wording for such notes. Also, even though I have a pretty clear idea of it, does somebody happen to know what the purpose of a translator's note is and when exactly its use is justified? Bonus points if you can tell me how all this is done in French.

Thanks in advance!

Viktoria Gimbe wrote:

Paula, is this what is being used in the House of Commons transcripts (Edited Hansard)? It looks a lot like it... I was hesitant to apply it because it may also just be the House of Commons convention, not a widely accepted one.