diff --git a/cnam/travaux/thesis/build.py b/cnam/travaux/thesis/build.py
index 29d46e7..0e55962 100755
--- a/cnam/travaux/thesis/build.py
+++ b/cnam/travaux/thesis/build.py
@@ -16,18 +16,6 @@ DOCUMENTS = [
     {ENGLISH: 'thesis', FRENCH: 'mémoire'},
     {ENGLISH: 'presentation', FRENCH: 'présentation'},
 ]
-TITLE_SHORT = {
-    ENGLISH: 'Incremental Live OS',
-    FRENCH: 'SE autonomes incrémentaux',
-}
-TITLE_LONG = {
-    ENGLISH: 'Incremental Live Operating Systems',
-    FRENCH: 'Systèmes d’Exploitation autonomes incrémentaux',
-}
-SUBTITLE = {
-    ENGLISH: 'a reversal of conventional approaches',
-    FRENCH: 'une inversion des approches conventionnelles',
-}
 
 
 def run(command):
@@ -66,9 +54,6 @@ def build(directory, sign):
             os.chdir(document[ENGLISH])
             # prepare variables
             variables = {
-                'titleshort': TITLE_SHORT[language],
-                'titlelong': TITLE_LONG[language],
-                'titlesub': SUBTITLE[language],
                 'name': MAIN,
                 'mainlanguage': language,
                 'otherlanguages': other_languages,
diff --git a/cnam/travaux/thesis/common.tex b/cnam/travaux/thesis/common.tex
index 9ad7190..9d4b43f 100644
--- a/cnam/travaux/thesis/common.tex
+++ b/cnam/travaux/thesis/common.tex
@@ -7,6 +7,12 @@
 \def\dateshort{2021}
 \def\datelong{\ml{Month DD, \dateshort}{JJ Mois \dateshort}}
 
+\def\titleshort{\ml{Incremental Live OS}{SE autonomes incrémentaux}}
+\def\titlelong{\ml{Incremental Live Operating Systems}
+{Systèmes d’Exploitation autonomes incrémentaux}}
+\def\titlesub{\ml{a reversal of conventional approaches}
+{une inversion des approches conventionnelles}}
+
 \def\typeshort{\ml{Thesis}{Mémoire}}
 \def\typelong{\ml{CNAM Master's \typeshort}
 {\typeshort\ d’Ingénieur CNAM}}