If panel supports localization, it shall realize ILocalizableComponent interface.

/// <summary> 
    /// If designed component supports multi-language 
    /// localization, it shall implement this interface 
    /// </summary> 
    public interface ILocalizableComponent : IExternalComponent 
    { 
        /// <summary> 
        /// Apply new localization environment 
        /// </summary> 
        /// <param name="newLocale">new locale name</param> 
        void SetLocale(string newLocale); 
 
        /// <summary> 
        /// Visible name of designed component 
        /// </summary> 
        string VisibleName { get; } 
    }

SetLocale – called at language switch, VisibleName – component name at panel (need to be changed at language switch)
Locale is received in newLocale argument as string identificator. For now supported are: "en", "ru", "ar", "jp", "ch_sm", "ch_tr","gr", "fr" (english, russian, arabic, japanesse, chinesse, german, francias)