diff --git a/Rules/Languages/de/definitions.yaml b/Rules/Languages/de/definitions.yaml
index 163c3f86d..427eec726 100644
--- a/Rules/Languages/de/definitions.yaml
+++ b/Rules/Languages/de/definitions.yaml
@@ -28,7 +28,7 @@
     "minus": "infix=minus || prefix=negativ",
     "plus": "infix=plus || prefix=positiv",
     "real-part": "function=der reale teil",
-    "transpose": "postfix=transponieren || function=transponieren",
+    "transpose": "postfix=transponiert || function=die Transponierte",
     "magnitude": "function=; Norm: Norm: Norm; Ende Norm",
     "norm": "function=; norm: norm: norm; ende norm",
     "trace": "function=; spur : spur: die spur; ende spur",
diff --git a/tests/Languages/de/shared.rs b/tests/Languages/de/shared.rs
index d69acf25a..93d570108 100644
--- a/tests/Languages/de/shared.rs
+++ b/tests/Languages/de/shared.rs
@@ -3,6 +3,18 @@
 use crate::common::*;
 use anyhow::Result;
 
+#[test]
+fn transpose_uses_grammatical_german_forms() -> Result<()> {
+    // A superscript T uses the participle, while a function intent names the transpose.
+    let postfix = "<math><msup><mi>A</mi><mi>T</mi></msup></math>";
+    test("de", "ClearSpeak", postfix, "groß a transponiert")?;
+    test("de", "SimpleSpeak", postfix, "groß a transponiert")?;
+
+    let function = "<math><mrow intent='transpose:function($matrix)'><mi arg='matrix'>A</mi></mrow></math>";
+    test("de", "ClearSpeak", function, "die Transponierte von groß a")?;
+    Ok(())
+}
+
 #[test]
 fn ordinary_integer_powers() -> Result<()> {
     // Ordinary integer exponents use the idiomatic German "hoch" construction.