[1] Transform Rule Tutorial | ICU Documentation, , https://unicode-org.github.io/icu/userguide/transforms/general/rules.html
[4] transliteration_in_icu[1].ppt - n915-transliteration-icu.pdf, , https://www.open-std.org/jtc1/sc22/wg20/docs/n915-transliteration-icu.pdf
[3] Converting UTF-8 strings to ASCII using the ICU Transliterator, Bart van Raaij, , https://bartvanraaij.dev/2020-10-17-converting-utf8-strings-to-ascii-using-icu-transliterator/
[7] GitHub - geezorg/Xliterator: A general purpose (eventually) ICU based transliteration utility., https://github.com/geezorg/Xliterator