WP User Manager - Translate the profile URL slugs

wpum_translate_profile_tab_slugs.php

<?php

function wpum_profile_tabs_translation_mapping() {
	// Translated to Slovenian, change to your language
	return array(
		'about'    => 'priblizno',
		'posts'    => 'objave',
		'comments' => 'komentarj',
	);
}

add_filter( 'wpum_get_registered_profile_tabs', function ( $tabs ) {
	foreach ( wpum_profile_tabs_translation_mapping() as $tab => $translated_tab ) {
		if ( ! isset( $tabs[ $tab ] ) ) {
			continue;
		}
		$tabs[ $translated_tab ] = $tabs[ $tab ];

		unset( $tabs[ $tab ] );
	}

	return $tabs;
} );

add_filter( 'wpum_get_template_part', function ( $parts ) {
	$profile_tabs = wpum_profile_tabs_translation_mapping();

	foreach ( $parts as $part ) {
		foreach ( $profile_tabs as $tab => $translated_tab ) {
			if ( false !== strpos( $part, $translated_tab ) ) {
				$parts[] = str_replace( $translated_tab, $tab, $part );
			}
		}

	}

	return $parts;
} );

Save this file to your /wp-content/mu-plugins/ directory (you might need to create the mu-plugins directory).