abp/framework/src/Volo.Abp.Localization/Volo/Abp/Localization/LocalizationSettingProvider.cs

using Volo.Abp.Localization.Resources.AbpValidation;
using Volo.Abp.Settings;

namespace Volo.Abp.Localization
{
    public class LocalizationSettingProvider : SettingDefinitionProvider
    {
        public override void Define(ISettingDefinitionContext context)
        {
            context.Add(
                new SettingDefinition(LocalizationSettingNames.DefaultLanguage, "en", L("DisplayName:Abp.Localization.DefaultLanguage"), L("Description:Abp.Localization.DefaultLanguage"), isVisibleToClients: true)
            );
        }
        private static LocalizableString L(string name)
        {
            return LocalizableString.Create<AbpValidationResource>(name);
        }
    }
}