John Fairbairn wrote:I would imagine that there may be among our readers some older Germans or Italians, whose regional languages used to be very different, who have had a similar experience. Maybe modern Norwegians still have similar problems with bokmal and nynorsk.
I'm not an older German, but a young Austrian, so I feel qualified to comment on that as well
In Austria, there are tons of dialects, some only slightly different, some very different to each other, and most of them very different to standard German. In Austria, the "official" language is "Austrian German", which is only slightly different from standard German as spoken in Germany (certainly less different than e.g. American and British English). That's the language taught at school, students have to write their esseys using that language and so on. Also, all written communication, TV programs and so on are in stardard German.
But in "real life", everyone just speaks the local dialect. That includes formal occasions like business meetings, and also teachers at school. Pretty much everyone understands everyone else's dialect, except in extreme cases (e.g. I would have problems understanding people living near the Swiss border). But most Germans (especially from northern Germany) will generally have problems understanding most Austrians when talking among themselves.
When I have contact with someone who doesn't understand my dialect, I am able to speak in a kind of "weaker" dialect without much effort, so everyone can understand me. To a German, it will still sound like I'm talking in Austrian dialect, but it will be comprehensible. To another Austrian, it will just sound funny
Do I have problems because of that? In practice, not really. If I really want and the situation calls for it, I can speak standard German. But it's hard. Don't get me wrong: In written text, my standard German is at native-speaker level. I just don't get much oral practice, so I'm not really able to speak it without accent (at least freely, reading written text aloud is easier). But that's not a problem in practice. After all, I'm not able to speak English with an accent either, but I'm still able to communicate with English native speakers