dnf: fix output parsing on non-English LANGUAGE systems (#78233)

Fixes #78193

changelogs/fragments/dnf-fix-locale-language.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - "dnf - fix output parsing on systems with ``LANGUAGE`` set to a language other than English (https://github.com/ansible/ansible/issues/78193)"

lib/ansible/modules/dnf.py

@@ -553,7 +553,8 @@ class DnfModule(YumDnf):
 
     def _ensure_dnf(self):
         locale = get_best_parsable_locale(self.module)
-        os.environ['LC_ALL'] = os.environ['LC_MESSAGES'] = os.environ['LANG'] = locale
+        os.environ['LC_ALL'] = os.environ['LC_MESSAGES'] = locale
+        os.environ['LANGUAGE'] = os.environ['LANG'] = locale
 
         global dnf
         try: