C# simple language system

C# simple language system

/*
Usage example:
Set language: language.initLanguage(0); //English
Get translation: language.getTranslation("menu.file");
With multiple arguments: language.getTranslation("proversion", "Max Mustermann", "12/31/2017");

Example .xml:
<language>
	<!-- ENGLISH -->
	<language langid="0" identifier="menu.file" text="File"/>
	<language langid="0" identifier="proversion" text="Pro Version licensed for %s until %s"/>
	<!-- GERMAN -->
	<language langid="1" identifier="menu.file" text="Datei"/>
	<language langid="1" identifier="proversion" text="Pro Version lizenziert für %s bis zum %s"/>
</language>
*/
using System;
using System.Collections.Generic;
using System.Xml;

public static class language
{
    public class languageSentences
    {
        public string identifier { get; set; }
        public string text { get; set; }
    }

    public static List<languageSentences> lang = new List<languageSentences>();

    public static void initLanguage(int id)
    {
        XmlReader xmlReader = XmlReader.Create(AppDomain.CurrentDomain.BaseDirectory + "\\data\\language.xml");
        while (xmlReader.Read())
        {
            if ((xmlReader.NodeType == XmlNodeType.Element) && (xmlReader.Name == "language"))
            {
                if (xmlReader.HasAttributes)
                {
                    if (int.Parse(xmlReader.GetAttribute("langid")) == id)
                    {
                        lang.Add(new languageSentences
                        {
                            identifier = xmlReader.GetAttribute("identifier"),
                            text = xmlReader.GetAttribute("text")
                        });
                    }
                }
            }
        }
    }

    public static string ReplaceFirst(string text, string search, string replace)
    {
        int pos = text.IndexOf(search);
        if (pos < 0)
        {
            return text;
        }
        return text.Substring(0, pos) + replace + text.Substring(pos + search.Length);
    }

    public static string getTranslation(string sentence, params object[] arguments)
    {
        foreach (languageSentences tmp in lang)
        {
            if (tmp.identifier == sentence)
            {
                if (tmp.text.Contains("%s"))
                {
                    if (arguments == null)
                    {
                        return "Error #1.";
                    }

                    if (tmp.identifier == sentence)
                    {
                        string _tmp = tmp.text;
                        foreach (object o in arguments)
                        {
                            _tmp = ReplaceFirst(_tmp, "%s", o.ToString());
                        }
                        _tmp = _tmp.Replace("~n~", Environment.NewLine);
                        return _tmp;
                    }
                }
                else
                {
                    return tmp.text;
                }
            }
        }
        return "Error #2.";
    }
}