in Runtime/Tokenizers/Normalizers/Normalizers.cs [153:162]
public string StripAccents(string text)
{
// Normalize used is NFD: NFD (Normalization Form Canonical Decomposition):
// Characters are decomposed into their constituent parts.
// For example, a character with a diacritic is split into a base character and a
// separate diacritic character.
// ## NFD is NormalizationForm.FormD
// Then we replace accents (regex) with ""
return Regex.Replace(text.Normalize(NormalizationForm.FormD), @"[\u0300-\u036f]", "");
}