diff --git a/qutebrowser/browser/webengine/webenginesettings.py b/qutebrowser/browser/webengine/webenginesettings.py
index 7783cd38e..edae90130 100644
--- a/qutebrowser/browser/webengine/webenginesettings.py
+++ b/qutebrowser/browser/webengine/webenginesettings.py
@@ -137,7 +137,9 @@ class DictionaryLanguageSetter(DefaultProfileSetter):
     def _find_installed(self, code):
         installed_file = spell.installed_file(code)
         if not installed_file:
-            message.warning('Language {} is not installed.'.format(code))
+            message.warning(
+                'Language {} is not installed - see scripts/install_dict.py '
+                'in qutebrowser\'s sources'.format(code))
         return installed_file
 
     def _set(self, value, settings=None):
@@ -219,6 +221,10 @@ def _init_profiles():
     _init_stylesheet(private_profile)
     _set_http_headers(private_profile)
 
+    if qtutils.version_check('5.8'):
+        default_profile.setSpellCheckEnabled(True)
+        private_profile.setSpellCheckEnabled(True)
+
 
 def init(args):
     """Initialize the global QWebSettings."""
diff --git a/scripts/install_dict.py b/scripts/install_dict.py
index ce5bc1bdb..7ce333848 100755
--- a/scripts/install_dict.py
+++ b/scripts/install_dict.py
@@ -149,7 +149,7 @@ def install_lang(lang):
     print('Installing {}: {}'.format(lang.code, lang.name))
     lang_url = urllib.parse.urljoin(API_URL, lang.file_path, '?format=TEXT')
     if not os.path.isdir(spell.dictionary_dir()):
-        warn_msg = 'WARN: {} does not exist, creating the directory'
+        warn_msg = '{} does not exist, creating the directory'
         print(warn_msg.format(spell.dictionary_dir()))
         os.makedirs(spell.dictionary_dir())
     print('Downloading {}'.format(lang_url))