What impact to use Dataset.locale

When I have to use Dataset.locale for sorting? I have data retrieved from database (stored in NVARCHAR) and data has simple byte and double bytes characters.

If I use Dataset.locale, will it affects my DataView sorting result? Let's say, If "en-US" and "ja-JP" are gven in Locale, will the sorted DataView change becuase of different LocaleId? I did several tests, and don't see anything different. Just wondering when I should use DataSet locale and what are the impacts if I use it?