diff --git a/module2/exo5/exo5_python-en.org b/module2/exo5/exo5_python-en.org
index ea94f6863b7361ea62e10b1f8c34ceae45bef491..69bbe07c4f8ee03b8d2a33a7f15cf68bed7e6994 100644
--- a/module2/exo5/exo5_python-en.org
+++ b/module2/exo5/exo5_python-en.org
@@ -1,4 +1,4 @@
-#+TITLE: Analyse du risque de défaillance des joints toriques de la navette Challenger
+#+TITLE: Analysis of the risk of failure of the O-rings on the Challenger shuttle
 #+AUTHOR: Arnaud Legrand
 #+LANGUAGE: fr
 
@@ -26,12 +26,12 @@ had been performed at this temperature.
 The following study therefore takes up some of the analyses carried out in this study
 night and whose objective was to assess the potential influence of
 the temperature and pressure to which the seals are subjected
-torics on their probability of malfunction. To do this, we
+O-rings on their probability of malfunction. To do this, we
 have the results of the experiments carried out by the engineers
 of NASA during the 6 years preceding the launch of the shuttle
 Challenger.
 
-* Chargement des données
+* Data loading
 So we start by loading this data:
 #+begin_src python :results value :session *python* :exports both
 import numpy as np
@@ -166,9 +166,9 @@ and the standard error of this estimator is 0.122, in other words we
 cannot distinguish any particular impact and we must take our
 estimates with caution.
 
-* Estimation of the probability of malfunctioning toric seals
+* Estimation of the probability of malfunctioning O-rings
 The expected temperature on take-off day is 31°F. Let's try to
-estimate the probability of malfunctioning toric seals at
+estimate the probability of malfunctioning O-rings at
 this temperature from the model we just built:
 
 #+begin_src python :results output file :var matplot_lib_filename="proba_estimate_python.png" :exports both :session *python* 
@@ -189,7 +189,7 @@ print(matplot_lib_filename)
 
 As expected from the initial data, the
 temperature has no significant impact on the probability of failure of the
-toric seals. It will be about 0.2, as in the tests
+O-rings. It will be about 0.2, as in the tests
 where we had a failure of at least one joint. Let's get back to the subject
 to the set of initial data to estimate the probability of
 failure of a seal:
@@ -213,7 +213,7 @@ tomorrow as planned.
 Only the next day, the Challenger shuttle will explode and take away
 with her seven crew members. Public opinion is
 affected and in the subsequent investigation, the reliability of the
-toric seals will be directly implicated. Beyond the problems
+O-rings will be directly implicated. Beyond the problems
 of internal communication at NASA, which have a lot to do with this
 fiasco, the previous analysis includes (at least) a small
 problem.... Can you find it? You are free to modify this
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