--- a/docs/details-frpseudocode.rst	Wed May 06 18:23:48 2026 +0200
+++ b/docs/details-frpseudocode.rst	Wed May 06 21:35:06 2026 +0200
@@ -2,6 +2,70 @@
 
 **************
  FrPseudocode
-************** 
+**************
+
+This is the pseudocode lexer from the original `pygments-lexer-pseudocode`
+package.
+
+It has been changed somewhat:
+
+- renamed from ``Pseudocode`` to ``FrPseudocode``
+- changed aliases to ``fr-pseudocode``, ``fr-pseudo``, ``fr-algorithm``
+  and ``fr-algo``
+- changed file extension to ``.fr-algo`` and ``.fr-pseudocode``
+- changed some exististing arrows and added some more
+- numbers parsing is more flexible by following the Python lexer
+- also allow ``!=`` as inequality operator (in addition to ``<>``)
+
+It mostly just recognizes some (french) keywords and highlights them.
+
+Comments are supported (``//`` and ``/* ... */`` (single-line only))-
+"Directives" in "special" comments are to be enclosed in curly braces ``{ ... }``.
+
+It also implements some symbol replacements/conversions like
+``<=`` to ``≤``, ``>=`` to ``≥`` or ``<>`` to ``≠``.
+
+
+.. rubric:: Example:
+
+The follwing example
+
+.. code-block:: none
+
+   /* foo bar */
 
-.. todo:: Docs for FrPseudocode need to be done.
+   fonction fonc-1({passage par valeur}param1)
+   début
+     si param1 <= 0 alors
+       b = 0
+     sinon
+       b = 1
+       a = param1
+       répéter
+         a = a - 1
+         b = b * 2
+       tantque a <> 0
+     fin si
+     retourner b
+   fin fonction
+
+will be highlighted as
+
+.. code-block:: fr-algorithm
+
+   /* foo bar */
+
+   fonction fonc-1({passage par valeur}param1)
+   début
+     si param1 <= 0 alors
+       b = 0
+     sinon
+       b = 1
+       a = param1
+       répéter
+         a = a - 1
+         b = b * 2
+       tantque a <> 0
+     fin si
+     retourner b
+   fin fonction