" at the forum thread that we only talk yopaseopor and myself.  That's because we are the only two users in the Catalan community"

That's part of the problem. Traffic signs are not a local thing, but globally (or at least Europe-wide) very similar. A tagging scheme can't be discussed in a small local group, it needs to involve the whole community. That's what proposals are for.

Please don't use changeset comments to explain things, this information can't be found later.