UTF-8 normalization and casefolding support

modulename: utf8data.ko

configname: CONFIG_UNICODE

Linux Kernel Configuration
└─>File systems
└─>UTF-8 normalization and casefolding support
In linux kernel since version 5.1 (release Date: 2019-05-05)  
Say Y here to enable UTF-8 NFD normalization and NFD+CF casefolding
support. If you say M here the large table of case foldings will
be a separate loadable module that gets requested only when a file
system actually use it.

source code: