The caseFoldingType parameter allows for four case-folding types: none, ascii, unicode, and language-sensitive.
The language-sensitive case folding type requires additional information in order to be meaningful, to wit: it needs a language tag to define which language's case folding is desired.
http://www.w3.org/International/track/issues/498 [I18N-ISSUE-498]
http://www.w3.org/TR/2015/WD-findtext-20151015/#idl-def-caseFoldingType.language-sensitive
The caseFoldingType parameter allows for four case-folding types: none, ascii, unicode, and language-sensitive.
The language-sensitive case folding type requires additional information in order to be meaningful, to wit: it needs a language tag to define which language's case folding is desired.