[Theme Horse Support Team]

Hi micke,

You don’t need to reactivate the theme. Once you activate the child theme then it must work fine. Use sv_SE.mo and sv_SE.po file and keep these file inside the language folder. Use this code inside child theme of functions.php that i have provided before
load_theme_textdomain( 'ultimate', get_stylesheet_directory() . '/languages' ); // to add text domain language translate
Just have this link
http://www.wpbeginner.com/wp-themes/find-translate-translation-ready-wordpress-theme/

You may also visit to this site and its working fine.
http://www.scmarinhense.pt/category/institucional/

Thank you!