class RussianBreakingEngine : Typography.TextBreak.EngBreakingEngine {
  public override bool CanHandle(char c) => c is >= '\u0400' and <= '\u052f'; // Unicode Cyrillic and Cyrillic Supplement
}
CSharpMath.Rendering.Text.TextLaTeXParser.AdditionalBreakingEngines.Add(new RussianBreakingEngine());