GenericScriptableObj.cs

using UnityEngine;
using System.Collections.Generic;
using System;
using System.Linq;

namespace Assets.Scripts.Domain.Localization
{
    [CreateAssetMenu(fileName = "Localization", menuName = "Data/Localization")]
    public class LocalizationItem : ScriptableObject
    {
        public SystemLanguage Language;
        public List<Term> Terms;
    }

#if UNITY_EDITOR
    [UnityEditor.CustomEditor(typeof(LocalizationItem))]
    public class LocalizationEditor : UnityEditor.Editor
    {
        public override void OnInspectorGUI()
        {
            if (GUILayout.Button("Add"))
            {
                var translation = (LocalizationItem)target;
                translation.Terms.Add(new Term());
            }

            if (GUILayout.Button("Sort"))
            {
                var translation = (LocalizationItem)target;
                translation.Terms = translation.Terms.OrderBy(o => o.Key).ToList();
            }

            DrawDefaultInspector();
        }
    }

#endif
}