Make GameplayMenuOverlay translatable

This allows translator to translate the pause and failed in game menus

osu.Game/Localisation/GameplayMenuOverlayStrings.cs

@@ -0,0 +1,49 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Localisation;
+
+namespace osu.Game.Localisation
+{
+    public static class GameplayMenuOverlayStrings
+    {
+        private const string prefix = @"osu.Game.Resources.Localisation.GameplayMenuOverlay";
+
+        /// <summary>
+        /// "Continue"
+        /// </summary>
+        public static LocalisableString Continue => new TranslatableString(getKey(@"continue"), @"Continue");
+
+        /// <summary>
+        /// "Retry"
+        /// </summary>
+        public static LocalisableString Retry => new TranslatableString(getKey(@"retry"), @"Retry");
+
+        /// <summary>
+        /// "Quit"
+        /// </summary>
+        public static LocalisableString Quit => new TranslatableString(getKey(@"quit"), @"Quit");
+
+        /// <summary>
+        /// "failed"
+        /// </summary>
+        public static LocalisableString FailedHeader => new TranslatableString(getKey(@"failed_header"), @"failed");
+
+        /// <summary>
+        /// "paused"
+        /// </summary>
+        public static LocalisableString PausedHeader => new TranslatableString(getKey(@"paused_header"), @"paused");
+
+        /// <summary>
+        /// "you're dead, try again?"
+        /// </summary>
+        public static LocalisableString FailedDescription => new TranslatableString(getKey(@"failed_description"), @"you're dead, try again?");
+
+        /// <summary>
+        /// "you're not going to do what i think you're going to do, are ya?"
+        /// </summary>
+        public static LocalisableString PausedDescription => new TranslatableString(getKey(@"paused_description"), @"you're not going to do what i think you're going to do, are ya?");
+
+        private static string getKey(string key) => $@"{prefix}:{key}";
+    }
+}

osu.Game/Screens/Play/FailOverlay.cs

@@ -15,6 +15,8 @@ using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
+using osu.Framework.Localisation;
+using osu.Game.Localisation;
 
 namespace osu.Game.Screens.Play
 {
@@ -22,14 +24,14 @@ namespace osu.Game.Screens.Play
     {
         public Func<Task<ScoreInfo>> SaveReplay;
 
-        public override string Header => "failed";
+        public override LocalisableString Header => GameplayMenuOverlayStrings.FailedHeader;
-        public override string Description => "you're dead, try again?";
+        public override LocalisableString Description => GameplayMenuOverlayStrings.FailedDescription;
 
         [BackgroundDependencyLoader]
         private void load(OsuColour colours)
         {
-            AddButton("Retry", colours.YellowDark, () => OnRetry?.Invoke());
+            AddButton(GameplayMenuOverlayStrings.Retry, colours.YellowDark, () => OnRetry?.Invoke());
-            AddButton("Quit", new Color4(170, 27, 39, 255), () => OnQuit?.Invoke());
+            AddButton(GameplayMenuOverlayStrings.Quit, new Color4(170, 27, 39, 255), () => OnQuit?.Invoke());
             // from #10339 maybe this is a better visual effect
             Add(new Container
             {

osu.Game/Screens/Play/GameplayMenuOverlay.cs

@@ -15,6 +15,7 @@ using osu.Framework.Graphics.Effects;
 using osu.Framework.Graphics.Shapes;
 using osu.Framework.Input.Bindings;
 using osu.Framework.Input.Events;
+using osu.Framework.Localisation;
 using osu.Game.Graphics;
 using osu.Game.Graphics.Containers;
 using osu.Game.Graphics.Sprites;
@@ -51,9 +52,9 @@ namespace osu.Game.Screens.Play
         /// </summary>
         protected virtual Action SelectAction => () => InternalButtons.Selected?.TriggerClick();
 
-        public abstract string Header { get; }
+        public abstract LocalisableString Header { get; }
 
-        public abstract string Description { get; }
+        public abstract LocalisableString Description { get; }
 
         protected SelectionCycleFillFlowContainer<DialogButton> InternalButtons;
         public IReadOnlyList<DialogButton> Buttons => InternalButtons;
@@ -170,7 +171,7 @@ namespace osu.Game.Screens.Play
 
         protected override bool OnMouseMove(MouseMoveEvent e) => true;
 
-        protected void AddButton(string text, Color4 colour, Action action)
+        protected void AddButton(LocalisableString text, Color4 colour, Action action)
         {
             var button = new Button
             {

osu.Game/Screens/Play/PauseOverlay.cs

@@ -9,9 +9,11 @@ using osu.Framework.Allocation;
 using osu.Framework.Audio;
 using osu.Framework.Graphics;
 using osu.Framework.Input.Events;
+using osu.Framework.Localisation;
 using osu.Game.Audio;
 using osu.Game.Graphics;
 using osu.Game.Input.Bindings;
+using osu.Game.Localisation;
 using osu.Game.Skinning;
 using osuTK.Graphics;
 
@@ -23,8 +25,8 @@ namespace osu.Game.Screens.Play
 
         public override bool IsPresent => base.IsPresent || pauseLoop.IsPlaying;
 
-        public override string Header => "paused";
+        public override LocalisableString Header => GameplayMenuOverlayStrings.PausedHeader;
-        public override string Description => "you're not going to do what i think you're going to do, are ya?";
+        public override LocalisableString Description => GameplayMenuOverlayStrings.PausedDescription;
 
         private SkinnableSound pauseLoop;
 
@@ -33,9 +35,9 @@ namespace osu.Game.Screens.Play
         [BackgroundDependencyLoader]
         private void load(OsuColour colours)
         {
-            AddButton("Continue", colours.Green, () => OnResume?.Invoke());
+            AddButton(GameplayMenuOverlayStrings.Continue, colours.Green, () => OnResume?.Invoke());
-            AddButton("Retry", colours.YellowDark, () => OnRetry?.Invoke());
+            AddButton(GameplayMenuOverlayStrings.Retry, colours.YellowDark, () => OnRetry?.Invoke());
-            AddButton("Quit", new Color4(170, 27, 39, 255), () => OnQuit?.Invoke());
+            AddButton(GameplayMenuOverlayStrings.Quit, new Color4(170, 27, 39, 255), () => OnQuit?.Invoke());
 
             AddInternal(pauseLoop = new SkinnableSound(new SampleInfo("Gameplay/pause-loop"))
             {