FuzzyEquals and FuzzyMatches does not work with hebrew charachters - and seem to ignore them.
However other fuzzy methods like DiceCoefficient work well.
sample code:
string str1 = "אבג";
string str2 = str1;
Console.WriteLine(str1.FuzzyEquals(str2));
Console.WriteLine(str1.FuzzyMatch(str2));
str1 = "abc";
str2 = str1;
Console.WriteLine(str1.FuzzyEquals(str2));
Console.WriteLine(str1.FuzzyMatch(str2));
Results:
False
-0.0625
True
0.999999