Card: back button i18n

app/soapbox/components/ui/card/card.tsx

@@ -62,7 +62,7 @@ const CardHeader: React.FC<ICardHeader> = ({ children, backHref, onBackClick }):
     return (
       <Comp {...backAttributes} className='mr-2 text-gray-900 dark:text-gray-100' aria-label={intl.formatMessage(messages.back)}>
         <SvgIcon src={require('@tabler/icons/icons/arrow-left.svg')} className='h-6 w-6' />
-        <span className='sr-only' data-testid='back-button'>Back</span>
+        <span className='sr-only' data-testid='back-button'>{intl.formatMessage(messages.back)}</span>
       </Comp>
     );
   };