all teh german error messages

prolefeeder.py

@@ -17,12 +17,16 @@ from config import Config
 
 app = Flask(__name__)
 app.config.from_object(Config)
+app.config['WTF_I18N_ENABLED'] = False  # enables WTForms built-in translations
 Bootstrap(app)
 
 attachment_filenames = {}
 
 
 class DownloadForm(FlaskForm):
+    class Meta:
+        locales = ['de_DE', 'de']
+
     start_time = DateTimeField('Startzeit',
                                validators=[InputRequired()],
                                format='%d.%m.%Y %H:%M')