Andreas Lattmann, yes I'm local.

StefanB, thanks for reporting missing Munich Italian version, I updated.

Ok, Munich, so relation/62428
All name=* and one old_name:sl. Do you really think it is correct? I find it a little bit curious, but I don't know Slovenian, so I cannot say anything (but I asked some Slovenian friend and they said they know it).
About your question, in case of a disaster... yes Italian media would use its Italian name. And this is exactly the point. It's not a dead name. Maybe in future, but not nowadays.

Oh, no, I'm not worried about rendering. I never said anything about this point. And I agree, old_name gives more information than name if a name is no more used. It's a more detailed tag, sure. But if (I want to underline "if") it is no more used, obsolete, ... The point is these names are actually used. Ok, maybe in one, two centuries they will be no more used, but it's not the actual situation. So tag old_name is a wrong tag in this cases.
Andreas Lattmann, some name was officially given after they were part of Italy, in particular for some small villages, but big ones had always had Italian and German names. Sometimes it was a matter of pronunciation, like this one: Brestovizza is how you write in Italian and Brestovica in Slovenian, but they have the same pronunciation (so Italians called them in the same way also before an official act).
Remember all openstreetmap border areas have multilingual names. Moving to old_name only in this region is not coherent, nor correct.

First of all there were many tags name:*. Then someone moved name:* in old_name:*. And now I restored name:*. So the real point is why to remove name:* for old_name and not the opposite.
Then, Cascafico, you are speaking about one specific situation: official multilingual area. And in this case, sure, you have multilingual signs, multilingual official websites and, furthermore, you have also something like name=name_lang_1 / name_lang_2 / name_lang_3, ... Are we in this situation? No. So, another case. Which one? Places who have names in other languages. Which places? Every type of place: town, village, river, mountain, sea, gulf, ... so why do you focus only on cities? Are there signs near a sea? Signs are only in cities, but openstreetmap is not only for cities. It's a completely generic speech. Any entity can have a multilingual name. for historical, reasons, for cultural reasons, ... Italian is a so rich language, full of literature. We haven't to be so barbaric to remove information if we don't know them. There's a possibility to have a lot of information here, so better to add them, not to remove them. What about languages like Latin? Tag name:la is used. Why a name like Lipizza should be removed? Open an Italian dictionary (like Treccani, Garzanti), search for lipizzano and you will find Lipizza. Open some Italian atlas, you will find Italian names. Clearly is not so easy to find Italian names for small villages, but it's a consequence of their size (it does not mean they are no more used).
Let me ask you a question: why don't you go to Alsace villages and move name:de to old_name:de?

I want to explain better. It doesn't concern a road signal, but a name used in a language. If you go to London, you will find a lot of name:*. Tags old_name:* are for historical names, used in a period, changed to new names, like Istanbul (name:Instanbul, old_name:Constantinople). old_name:* go with name:*, they stay together.
Remember also name:* are used for languages, not exclusively for other official languages spoken/recognised in a country. Don't look only at your area, Italians are about 140.000.000.

Why wrong? Only because you don't like? Please leave politics outside openstreetmap and don't remove information for your personal ideas.

Lipizza, Sesana? Have you ever seen some map before fascism? Probably do not you, it you really believe in what you day. But this is not the point. There are millions of Italians using them. Look at wikipedia and Google maps, Italian version, just to make a stupid example