(Reply to 2 bad links in Gmail plasmoid for images )
I agree. I do translations myself, and this is a problem. Unfortunately there is no obvious solution. I don't think that we can remove a page from the translation system once it has been added (other than possibly by deleting existing translations, which might create even more problems).
We could create a Category for such pages, but that would only be useful if we remember to check that a page is not in this no-translate category before starting to work on it. Do you think it would be a good idea to do that?