diff --git a/doc/upstream-training/01-release-cycle.rst b/doc/upstream-training/01-release-cycle.rst
index 4a1e4607..539df00f 100644
--- a/doc/upstream-training/01-release-cycle.rst
+++ b/doc/upstream-training/01-release-cycle.rst
@@ -68,10 +68,20 @@ Implementation : freezes
 ========================
 
 .. class:: colleft
-- Feature proposal freeze
-- String freeze
 - Feature freeze
 
+  - new features will not be accepted, only fixes
+
+- Feature proposal freeze
+
+  - not even proposals for features will be accepted
+  - read: focus on bug-fixing
+
+- String freeze
+
+  - all externally visible strings must be frozen
+  - this helps the translation and documentation program
+
 .. class:: colright
 .. image:: ./_assets/01-01-release.png