Create a console application and copy this code:
1: using System;
2: using System.Collections.Generic;
3: using System.Linq;
4: using System.Text;
5: using System.Globalization;
6:
7: namespace CreateLanguage
8: {
9: public class CreateLanguage
10: {
11: public CreateLanguage()
12: {
13: }
14:
15: public CreateLanguage(string inputLine)
16: {
17: SetLanguage(inputLine);
18: }
19:
20: private void SetLanguage(string inputLine)
21: {
22: if (!String.IsNullOrEmpty(inputLine))
23: {
24: string[] LanguageCode = inputLine.Split('_');
25:
26: string copyLanguageId = LanguageCode[0];
27: string newLanguageId = LanguageCode[1];
28: string newLanguageName = LanguageCode[2];
29:
30: //* Get the base culture and region information
31: CultureInfo cultureInfo = new CultureInfo(copyLanguageId.ToString());
32: RegionInfo regionInfo = new RegionInfo(cultureInfo.Name);
33:
34: //* Create a locale
35: CultureAndRegionInfoBuilder cultureAndRegionInfoBuilder = new CultureAndRegionInfoBuilder(newLanguageId.ToString(), CultureAndRegionModifiers.None);
36:
37: //* Load the base culture and region information
38: cultureAndRegionInfoBuilder.LoadDataFromCultureInfo(cultureInfo);
39: cultureAndRegionInfoBuilder.LoadDataFromRegionInfo(regionInfo);
40:
41: //* Set the culture name
42: cultureAndRegionInfoBuilder.CultureEnglishName = newLanguageName.ToString();
43: cultureAndRegionInfoBuilder.CultureNativeName = newLanguageName.ToString();
44:
45: NumberFormatInfo nfi = cultureInfo.NumberFormat;
46:
47: cultureAndRegionInfoBuilder.NumberFormat = nfi;
48:
49: //* Register with your operating system
50: cultureAndRegionInfoBuilder.Register();
51: }
52: }
53: }
54: }
After compiling the code, then run a command prompt under administrative priviledges, where you type something like this: CreateLanguage.exe "en-EN" "en-RO" "English (România)"
Once you've run this program, fire up EPiServer in Admin mode, select 'Manage Web Site languages' from Config-tab, click 'Add language' and the new local will be ready to use.
PS: If you run EPiServer CMS 6 you will get a bug unless you write to EPiServer support and ask for a bug fixed EPiServer.dll. On EPiServer CMS 5 this works just fine. :-)