Localized dates and form fields

hi, can I know what is the translation plugin you are using?

I am not using a translation plugin. Most of the text is editable in the backend of the plugin, except for a those two examples.

Try adding this to the functions.php file of your theme, changing OLD and NEW as needed:

function my_em_text_rewrites($translation, $orig, $domain) {
	str_replace('OLD','NEW', $translation);
	return $translation;
}
add_action ( 'gettext', 'my_em_text_rewrites', 1, 3 );

Tried, but does not seeem to change anything. Did I do it correctly? https://imgur.com/OWNxu85

Can this be solved by installing WPML?

I see, however I think wordress date and time can be localize using wordpress in your language – https://codex.www.ads-software.com/WordPress_in_Your_Language

Installing local .mo language file solved it, thank you.