Common language - Kyotsuugoka

…There are large regional differences in the type of standard language used, and apart from Hokkaido, the words used around Tokyo tend to be closer to the national standard. In any region, the younger the person, the more likely they are to use the national standard, a phenomenon known as "standardization." It was previously said that it was difficult to standardize accents that are not expressed in written form, but recently, standardization has become more common not only in phonology, grammar, and words, but also in accents. …

*Some explanations of terms that refer to "standard language" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…どのような共通語が使われるかには地域差が大きく，北海道を別にすると，東京付近ほど全国共通語に近い言葉を使う。またどの地域でも若い人ほど全国共通語に近づく現象が認められ，これを〈共通語化〉と呼ぶ。文字表記に表れないアクセントについては，共通語化が困難といわれていたが，最近は，音韻，文法，単語だけでなくアクセントでも共通語化が盛んである。…

※「共通語化」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報