Update translation.rst

Co-authored-by: Christian Flothmann <[email protected]>

Author: MrYamous

translation.rst

@@ -1068,7 +1068,7 @@ unused translation messages templates:
 Suppose your application's default_locale is ``fr`` and you have configured
 ``en`` as the fallback locale (see :ref:`configuration
 <translation-configuration>` and :ref:`fallback <translation-fallback>` for
-how to configure these). And suppose you've already setup some translations
+how to configure these). And suppose you've already set up some translations
 for the ``fr`` locale:
 
 .. configuration-block::