https://www.drillio.com/en/2011/java-remove-accent-diacritic/
https://blog.mafr.de/2015/10/10/normalizing-text-in-java/
https://docs.oracle.com/javase/tutorial/i18n/text/normalizerapi.html
https://docs.oracle.com/javase/8/docs/api/java/text/Normalizer.html
http://stackoverflow.com/questions/24548186/how-to-normalize-all-special-characters-but-umlauts
http://stackoverflow.com/questions/5697171/regex-what-is-incombiningdiacriticalmarks
http://stackoverflow.com/questions/6579844/how-does-zalgo-text-work