diff --git a/tests/check_locale_format_consistency.py b/tests/check_locale_format_consistency.py
index 5ea1d365e..99107ccc2 100644
--- a/tests/check_locale_format_consistency.py
+++ b/tests/check_locale_format_consistency.py
@@ -2,6 +2,7 @@ import re
 import json
 import glob
 
+# List all locale files (except en.json being the ref)
 locale_folder = "../locales/"
 locale_files = glob.glob(locale_folder + "*.json")
 locale_files = [filename.split("/")[-1] for filename in locale_files]
@@ -9,20 +10,31 @@ locale_files.remove("en.json")
 
 reference = json.loads(open(locale_folder + "en.json").read())
 
+found_inconsistencies = False
+
+# Let's iterate over each locale file
 for locale_file in locale_files:
 
     this_locale = json.loads(open(locale_folder + locale_file).read())
 
+    # We iterate over all keys/string in en.json
     for key, string in reference.items():
+        # If there is a translation available for this key/string
         if key in this_locale:
 
+            # Then we check that every "{stuff}" (for python's .format())
+            # should also be in the translated string, otherwise the .format
+            # will trigger an exception!
             subkeys_in_ref = set(k[0] for k in re.findall(r"{(\w+)(:\w)?}", string))
             subkeys_in_this_locale = set(k[0] for k in re.findall(r"{(\w+)(:\w)?}", this_locale[key]))
 
             if any(key not in subkeys_in_ref for key in subkeys_in_this_locale):
+                found_inconsistencies = True
                 print("\n")
                 print("==========================")
                 print("Format inconsistency for string %s in %s:" % (key, locale_file))
                 print("%s   -> %s " % ("en.json", string))
                 print("%s   -> %s " % (locale_file, this_locale[key]))
 
+if found_inconsistencies:
+    sys.exit(1)