Fix syntax error in the command + add colors

.gitlab-ci.yml

@@ -61,8 +61,10 @@ translation:
   before_script:
   - *apt_get_update
   - apt-get install --yes gettext > /dev/null
+  # We cannot use a simple "find ... -exec msgcmp {} strings.po" because it
+  # would always return 0 as exit code
   script:
-    - files=$(find . -name strings.po -not -path './resources/language/resource.language.en_gb/*') && for file in files; do msgcmp $file ./resources/language/resource.language.en_gb/strings.po; done
+    - files=$(find . -name strings.po -not -path './resources/language/resource.language.en_gb/*') && for file in $files; do echo -e "\n\033[94mChecking translation file $file\033[0m"; msgcmp $file ./resources/language/resource.language.en_gb/strings.po; done
 
 # Pre-release job: will be available in all the merge requests with release
 # branches in order to verify the release can be actually created. The