Fix translate script with failure function

translate.sh

@@ -1,11 +1,17 @@
 #!/bin/bash
+
+function build_failure {
+   echo "Failed to build, check mkdocs build!"
+   exit -1
+}
+
 pip install -r requirements.txt
 if [ -f locales/messages.pot ]; then
     echo "Erasing old pot file (local cache)..."
     rm locales/messages.pot
 fi
 echo "Building docs to get new pot file..."
-mkdocs build -f mkdocs_es.yml --clean || echo "Failed to build, check mkdocs build!" && exit -1
+mkdocs build -f mkdocs_es.yml --clean || build_failure
 echo "Merging pofiles..."
 msgmerge -U locales/es_ES/LC_MESSAGES/messages.po locales/messages.pot
 echo "Opening updated pofile with poedit..."