New in @v8js v7.2 and Chrome 72: Intl.ListFormat
Efficiently format lists with “and” or “or” using the correct punctuation in any language!
https://developers.google.com/web/updates/2018/12/intl-listformat …pic.twitter.com/ZFtjcXQZ92
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At least it is more western than japanese 
That can be depending on the situation, but nonormally we do not use '、' for words in alphabet(even for Deutsch). As an Intl feature, that looks correct anyway!
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