Add qps-ploc pseudolocalization support

CHANGELOG.md

@@ -16,6 +16,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+### Added
+
+- [L10NSharp] Added pseudolocalization support: lookups for the standard `qps-ploc` pseudo-locale (`LocalizationManager.PseudoLocalizationLanguageId`) return the English text pseudolocalized at runtime (e.g. `[Tîitlée Mîissîing]`), so testers can spot non-internationalized strings and layout problems. Set `LocalizationManager.OfferPseudoLocalization = true` to include it in the offered UI languages; `LocalizationManager.PseudoLocalize(string)` exposes the transform directly. See `src/L10NSharp/Pseudo/README.md`.
+
 ## [10.0.0] - 2026-08-27
 
 ### Added

src/L10NSharp.Tests/LocalizationManagerTests_NoManagersLoaded.cs

@@ -56,6 +56,22 @@ public void GetDynamicString_NoManagerLoaded_EnglishNull_ReturnsId(string uiLang
 			}
 		}
 
+		/// <summary>
+		/// The pseudo-locale is treated like English here: with no manager loaded, the supplied
+		/// English text is still what gets returned, pseudolocalized.
+		/// </summary>
+		[Test]
+		public void GetDynamicStringOrEnglish_NoManagerLoaded_Pseudo_PseudolocalizesSuppliedEnglish()
+		{
+			var pseudo = LocalizationManager.PseudoLocalizationLanguageId;
+			Assert.That(
+				LocalizationManager.GetDynamicStringOrEnglish("Glom", "prefix.data", "data", null, pseudo),
+				Is.EqualTo(LocalizationManager.PseudoLocalize("data")));
+			Assert.That(
+				LocalizationManager.GetDynamicStringOrEnglish("Glom", "prefix.data", null, null, pseudo),
+				Is.EqualTo("prefix.data"));
+		}
+
 		[TestCase(null)]
 		[TestCase("en")]
 		[TestCase("es")]