Minor reword

Author: javiereguiluz

reference/constraints/Country.rst

@@ -86,9 +86,9 @@ alpha3
 
 **type**: ``boolean`` **default**: ``false``
 
-If this option is ``true``, then the constraint will valid the value as
-`ISO 3166-1 alpha-3`_ three-letter codes (e.g. France = ``FRA``) instead
-of the default `ISO 3166-1 alpha-2`_ two-letter codes (e.g. France = ``FR``).
+If this option is ``true``, the constraint checks that the value is a
+`ISO 3166-1 alpha-3`_ three-letter code (e.g. France = ``FRA``) instead
+of the default `ISO 3166-1 alpha-2`_ two-letter code (e.g. France = ``FR``).
 
 .. include:: /reference/constraints/_groups-option.rst.inc
 

reference/constraints/Language.rst

@@ -87,9 +87,9 @@ alpha3
 
 **type**: ``boolean`` **default**: ``false``
 
-If this option is ``true``, then the constraint will valid the value as
-`ISO 639-2`_ three-letter codes (e.g. French = ``fra``) instead
-of the default `ISO 639-1`_ two-letter codes (e.g. French = ``fr``).
+If this option is ``true``, the constraint checks that the value is a
+`ISO 639-2`_ three-letter code (e.g. French = ``fra``) instead of the default
+`ISO 639-1`_ two-letter code (e.g. French = ``fr``).
 
 .. include:: /reference/constraints/_groups-option.rst.inc