@NicolasChabanovsky If a person is trying to associate Question S (in spanish) with question E (in english) then such person has seen E. How can she not be aware about E being already associated with S? Only case I can imagine is when browser is not configured in spanish which is a bit weird for someone trying to associate spanish questions.
@NicolasChabanovsky Most people, when reading a spanish question, will not be interesting in knowing if it is associated with an english one. The only ones who would be interested, those wanting to make the association will already know. Thus keeping the comment provides useful information to nobody.,
@JoseAntonioDuraOlmos Let us consider an example: if I associate a question, then delete the comment, how another user who wants to associate will know that this question has been associated?
The comments might be useful. To have more information about an issue better then less.
@NicolasChabanovsky If the other user wants to associate the question he needs the link to the english question. Can't associate without it. When he views the english version she will know that it is already associated. That's how.
I think here the miss communication. We do not do association in real time.
Questions get associated via comments. Once in a period of time I query the DB for the comments, sync them with the app, and update a setting string on SOen. Only after that users will see the box on SOen.