diff --git a/ImperatorToCK3.UnitTests/ConverterGlobalsTests.cs b/ImperatorToCK3.UnitTests/ConverterGlobalsTests.cs
new file mode 100644
index 000000000..e0922b93f
--- /dev/null
+++ b/ImperatorToCK3.UnitTests/ConverterGlobalsTests.cs
@@ -0,0 +1,15 @@
+using System.Linq;
+using Xunit;
+
+namespace ImperatorToCK3.UnitTests;
+
+public class ConverterGlobalsTests {
+	[Fact]
+	public void SupportedLanguagesContainsPrimaryLanguageAndSecondaryLanguages() {
+		var supportedLanguages = ConverterGlobals.SupportedLanguages.ToArray();
+		Assert.Contains(ConverterGlobals.PrimaryLanguage, supportedLanguages);
+		foreach (var secondary in ConverterGlobals.SecondaryLanguages) {
+			Assert.Contains(secondary, supportedLanguages);
+		}
+	}
+}
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