How to transliterate Cyrillic to Latin text

Question

I have a method which turns any Latin text (e.g. English, French, German, Polish) into its slug form,

e.g. Alpha Bravo Charlie => alpha-bravo-charlie

But it can't work for Cyrillic text (e.g. Russian), so what I'm wanting to do is transliterate the Cyrillic text to Latin characters, then slugify that.

Does anyone have a way to do such transliteration? Whether by actual source or a library.

I'm coding in C#, so a .NET library will work. Alternatively, if you have non-C# code, I'm sure I could convert it.

Answer 1

You can use .NET open source dll library UnidecodeSharpFork to transliterate Cyrillic and many more languages to Latin.

Example usage:

Assert.AreEqual("Rabota s kirillitsey", "Работа с кириллицей".Unidecode());
Assert.AreEqual("CZSczs", "ČŽŠčžš".Unidecode());
Assert.AreEqual("Hello, World!", "Hello, World!".Unidecode());

Testing Cyrillic:

/// <summary>
/// According to http://en.wikipedia.org/wiki/Romanization_of_Russian BGN/PCGN.
/// http://en.wikipedia.org/wiki/BGN/PCGN_romanization_of_Russian
/// With converting "ё" to "yo".
/// </summary>
[TestMethod]
public void RussianAlphabetTest()
{
    string russianAlphabetLowercase = "а б в г д е ё ж з и й к л м н о п р с т у ф х ц ч ш щ ъ ы ь э ю я";
    string russianAlphabetUppercase = "А Б В Г Д Е Ё Ж З И Й К Л М Н О П Р С Т У Ф Х Ц Ч Ш Щ Ъ Ы Ь Э Ю Я";

    string expectedLowercase = "a b v g d e yo zh z i y k l m n o p r s t u f kh ts ch sh shch \" y ' e yu ya";
    string expectedUppercase = "A B V G D E Yo Zh Z I Y K L M N O P R S T U F Kh Ts Ch Sh Shch \" Y ' E Yu Ya";

    Assert.AreEqual(expectedLowercase, russianAlphabetLowercase.Unidecode());
    Assert.AreEqual(expectedUppercase, russianAlphabetUppercase.Unidecode());
}

Simple, fast and powerful. And it's easy to extend/modify transliteration table if you want to.

Answer 2

    public static string Translit(string str)
    {
        string[] lat_up = {"A", "B", "V", "G", "D", "E", "Yo", "Zh", "Z", "I", "Y", "K", "L", "M", "N", "O", "P", "R", "S", "T", "U", "F", "Kh", "Ts", "Ch", "Sh", "Shch", "\"", "Y", "'", "E", "Yu", "Ya"};
        string[] lat_low = {"a", "b", "v", "g", "d", "e", "yo", "zh", "z", "i", "y", "k", "l", "m", "n", "o", "p", "r", "s", "t", "u", "f", "kh", "ts", "ch", "sh", "shch", "\"", "y", "'", "e", "yu", "ya"};
        string[] rus_up = {"А", "Б", "В", "Г", "Д", "Е", "Ё", "Ж", "З", "И", "Й", "К", "Л", "М", "Н", "О", "П", "Р", "С", "Т", "У", "Ф", "Х", "Ц", "Ч", "Ш", "Щ", "Ъ", "Ы", "Ь", "Э", "Ю", "Я"};
        string[] rus_low = { "а", "б", "в", "г", "д", "е", "ё", "ж", "з", "и", "й", "к", "л", "м", "н", "о", "п", "р", "с", "т", "у", "ф", "х", "ц", "ч", "ш", "щ", "ъ", "ы", "ь", "э", "ю", "я"};
        for (int i = 0; i <= 32; i++)
        {
            str = str.Replace(rus_up[i],lat_up[i]);
            str = str.Replace(rus_low[i],lat_low[i]);              
        }
        return str;
    }

Answer 3

Optimized the answer of Sarvar Nishonboev, seems like a simplest solution without unnecessary complexity related to the re-creating of string at each iteration:

public static class Converter
{
    private static readonly Dictionary<char, string> ConvertedLetters = new Dictionary<char, string>
    {
        {'а', "a"},
        {'б', "b"},
        {'в', "v"},
        {'г', "g"},
        {'д', "d"},
        {'е', "e"},
        {'ё', "yo"},
        {'ж', "zh"},
        {'з', "z"},
        {'и', "i"},
        {'й', "j"},
        {'к', "k"},
        {'л', "l"},
        {'м', "m"},
        {'н', "n"},
        {'о', "o"},
        {'п', "p"},
        {'р', "r"},
        {'с', "s"},
        {'т', "t"},
        {'у', "u"},
        {'ф', "f"},
        {'х', "h"},
        {'ц', "c"},
        {'ч', "ch"},
        {'ш', "sh"},
        {'щ', "sch"},
        {'ъ', "j"},
        {'ы', "i"},
        {'ь', "j"},
        {'э', "e"},
        {'ю', "yu"},
        {'я', "ya"},
        {'А', "A"},
        {'Б', "B"},
        {'В', "V"},
        {'Г', "G"},
        {'Д', "D"},
        {'Е', "E"},
        {'Ё', "Yo"},
        {'Ж', "Zh"},
        {'З', "Z"},
        {'И', "I"},
        {'Й', "J"},
        {'К', "K"},
        {'Л', "L"},
        {'М', "M"},
        {'Н', "N"},
        {'О', "O"},
        {'П', "P"},
        {'Р', "R"},
        {'С', "S"},
        {'Т', "T"},
        {'У', "U"},
        {'Ф', "F"},
        {'Х', "H"},
        {'Ц', "C"},
        {'Ч', "Ch"},
        {'Ш', "Sh"},
        {'Щ', "Sch"},
        {'Ъ', "J"},
        {'Ы', "I"},
        {'Ь', "J"},
        {'Э', "E"},
        {'Ю', "Yu"},
        {'Я', "Ya"}
    };

    public static string ConvertToLatin(string source)
    {
        var result = new StringBuilder();
        foreach (var letter in source)
        {
            result.Append(ConvertedLetters[letter]);
        }
        return result.ToString();
    }
}

Use it like this:

Converter.ConvertToLatin("Проверочный текст");

Answer 4

Why can't you just take a transliteration table and make a small regex or subroutine?

Answer 5

You can use my library for transliteration: https://github.com/nick-buhro/Translit
It is also available on NuGet.

Example:

var latin = Transliteration.CyrillicToLatin(
    "Предками данная мудрость народная!", 
    Language.Russian);

Console.WriteLine(latin);   
// Output: Predkami dannaya mudrost` narodnaya!

Answer 6

Check this code:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace Transliter
{
    public partial class Form1 : Form
    {
        Dictionary<string, string> words = new Dictionary<string, string>();

        public Form1()
        {
            InitializeComponent();
            words.Add("а", "a");
            words.Add("б", "b");
            words.Add("в", "v");
            words.Add("г", "g");
            words.Add("д", "d");
            words.Add("е", "e");
            words.Add("ё", "yo");
            words.Add("ж", "zh");
            words.Add("з", "z");
            words.Add("и", "i");
            words.Add("й", "j");
            words.Add("к", "k");
            words.Add("л", "l");
            words.Add("м", "m");
            words.Add("н", "n");
            words.Add("о", "o");
            words.Add("п", "p");
            words.Add("р", "r");
            words.Add("с", "s");
            words.Add("т", "t");
            words.Add("у", "u");
            words.Add("ф", "f");
            words.Add("х", "h");
            words.Add("ц", "c");
            words.Add("ч", "ch");
            words.Add("ш", "sh");
            words.Add("щ", "sch");
            words.Add("ъ", "j");
            words.Add("ы", "i");
            words.Add("ь", "j");
            words.Add("э", "e");
            words.Add("ю", "yu");
            words.Add("я", "ya");
            words.Add("А", "A");
            words.Add("Б", "B");
            words.Add("В", "V");
            words.Add("Г", "G");
            words.Add("Д", "D");
            words.Add("Е", "E");
            words.Add("Ё", "Yo");
            words.Add("Ж", "Zh");
            words.Add("З", "Z");
            words.Add("И", "I");
            words.Add("Й", "J");
            words.Add("К", "K");
            words.Add("Л", "L");
            words.Add("М", "M");
            words.Add("Н", "N");
            words.Add("О", "O");
            words.Add("П", "P");
            words.Add("Р", "R");
            words.Add("С", "S");
            words.Add("Т", "T");
            words.Add("У", "U");
            words.Add("Ф", "F");
            words.Add("Х", "H");
            words.Add("Ц", "C");
            words.Add("Ч", "Ch");
            words.Add("Ш", "Sh");
            words.Add("Щ", "Sch");
            words.Add("Ъ", "J");
            words.Add("Ы", "I");
            words.Add("Ь", "J");
            words.Add("Э", "E");
            words.Add("Ю", "Yu");
            words.Add("Я", "Ya");
    }

        private void button1_Click(object sender, EventArgs e)
        {
            string source = textBox1.Text;
            foreach (KeyValuePair<string, string> pair in words)
            {
                source = source.Replace(pair.Key, pair.Value);
            }
            textBox2.Text = source;
        }
    }
}

cryllic to latin:

text.Replace(pair.Key, pair.Value); 

latin to cryllic

source.Replace(pair.Value,pair.Key);

Answer 7

Microsoft has a transliteration tool which includes a DLL you could hook into (you would need to check licensing restrictions if you're going to use it non-personally). You can read more about it in Dejan Vesić's blog post

Answer 8

For future readers

Windows 7+ can do this with its Extended Linguistic Services. (You'll need the Windows API Code Pack to do it from .NET)

Answer 9

Here is a great article that describes how to make a C# equivalent of this JavaScript one.

string result = DisplayInEnglish("Олъга Виктровна Василенко");

Answer 10

Use this method Just pass your Cyrillic word contain string and this method return Latin English string corresponding to Cyrillic string.

public static string GetLatinCodeFromCyrillic(string str)
    {

        str = str.Replace("б", "b");
        str = str.Replace("Б", "B");

        str = str.Replace("в", "v");
        str = str.Replace("В", "V");

        str = str.Replace("г", "h");
        str = str.Replace("Г", "H");

        str = str.Replace("ґ", "g");
        str = str.Replace("Ґ", "G");

        str = str.Replace("д", "d");
        str = str.Replace("Д", "D");

        str = str.Replace("є", "ye");
        str = str.Replace("Э", "Ye");

        str = str.Replace("ж", "zh");
        str = str.Replace("Ж", "Zh");

        str = str.Replace("з", "z");
        str = str.Replace("З", "Z");

        str = str.Replace("и", "y");
        str = str.Replace("И", "Y");

        str = str.Replace("ї", "yi");
        str = str.Replace("Ї", "YI");

        str = str.Replace("й", "j");
        str = str.Replace("Й", "J");

        str = str.Replace("к", "k");
        str = str.Replace("К", "K");

        str = str.Replace("л", "l");
        str = str.Replace("Л", "L");

        str = str.Replace("м", "m");
        str = str.Replace("М", "M");

        str = str.Replace("н", "n");
        str = str.Replace("Н", "N");

        str = str.Replace("п", "p");
        str = str.Replace("П", "P");

        str = str.Replace("р", "r");
        str = str.Replace("Р", "R");

        str = str.Replace("с", "s");
        str = str.Replace("С", "S");

        str = str.Replace("ч", "ch");
        str = str.Replace("Ч", "CH");

        str = str.Replace("ш", "sh");
        str = str.Replace("Щ", "SHH");

        str = str.Replace("ю", "yu");
        str = str.Replace("Ю", "YU");

        str = str.Replace("Я", "YA");
        str = str.Replace("я", "ya");

        str = str.Replace('ь', '"');
        str = str.Replace("Ь", "");

        str = str.Replace('т', 't');
        str = str.Replace("Т", "T");

        str = str.Replace('ц', 'c');
        str = str.Replace("Ц", "C");

        str = str.Replace('о', 'o');
        str = str.Replace("О", "O");

        str = str.Replace('е', 'e');
        str = str.Replace("Е", "E");

        str = str.Replace('а', 'a');
        str = str.Replace("А", "A");

        str = str.Replace('ф', 'f');
        str = str.Replace("Ф", "F");

        str = str.Replace('і', 'i');
        str = str.Replace("І", "I");

        str = str.Replace('У', 'U');
        str = str.Replace("у", "u");

        str = str.Replace('х', 'x');
        str = str.Replace("Х", "X");
        return str;
    }