Similar situation in South Tyrol (an province at the border to Austria): the german-speaking minority (who is the majority in the province) primarily uses italian curse words. A theory I once read trying to explain this is that you hope that God is less likely to notice you when you curse in a different language.

I would imagine that this has similar root causes like Italian in South Tyrol. About 100 years ago in an attempt to forcefully italianize the german-speaking Tyroleans the fascists moved a lot of italians from all over Italy into South Tyrol, resulting in a very clean italian (somewhat “high-italian”) being spoken there, opposed to the various regional dialects all over Italy. The clean language is a more common ground between everyone, so it makes sense to default to that (and is a lot closer to the language foreigners learn)

adding to this very good answer: especially in Europe legal, cultural and language borders can differ quite a bit due to history and geography. I’m from South Tyrol, an italian province at the Austrian border. The majority of people there speak a german dialect, we have german schools, public administration and everything, but are a language minority in Italy. The historic explanation is that after WW1 this region became part of Italy, taken fron Austria-Hungary.

Further there is a third official language in South Tyrol, basically only spoken in two valleys anymore, the “Ladin”. It’s a very old language, related to similar language island in adjacent italian provinces and Switzerland. Those languages basically just preserved themselves for geographic reasons (hard accessible valleys and mountains). for this reason those languages tend to differ already between to neighbouring valleys. I was tought, that most of South Tyrol spoke Ladin at some point, but after the Swiss turned Calvinistic, the catholic (and austrian) bishop of the region forced the south-tyroleans to speak german to distance them from the heretic Swiss.^^

During WW2 the fascists in Italy forced South Tyrol to speak italian and forbade everything german, including local, personal and family names; one reson certainly was to enforce this ideology of “one nation, one culture, one people”.

Returning to OPs question: In South Tyrol there are german schools, where you learn italian and english as mandatory second languages, analogously for italian schools. Both languages are valid for any official entity (in theory). In the valleys mentiined above, they also have ladin schools.

The problem with live traffic awareness is, that it needs a lot of data to be collected all the time, something only Google or Apple with their monopolistic and privacy invasive ppwer can do. How it works (simplified) is that Google can detect if a lot of phones are on the same street and therefore assumes traffic. This data is, however, proprietary to Google. A FOSS App has the following problems:

• Too small of a userbase, to reliably track something
• Privacy conscious userbase, not wanting to be tracked
• If it had auch a feature, it would be opt-in, as FOSS does (usually) not try to be as evil as Google&Co.
• Usually limited server capacity to calculate if an aggregation is traffic

Solutions would be:

• Google is forced to make the data publicly available per API as part of some anti-monopolistic ruling
• A thrid party (e.g. cities) have their own monitoring of traffic and give public access to it.

So sadly similar dunctionality will not come in the near future in any FOSS app.