Convert Links repeatable fields to Languages repeatable fields with WP Job Manager Field Editor

functions.php

<?php

add_filter( 'gettext', 'smyles_replace_url_wording_text', 10, 3 );

function smyles_replace_url_wording_text( $translation, $text, $domain ) {

	if( $domain === 'wp-job-manager-resumes' ){

		if( $text === 'URL' ){ // Add button
			$translation = __( 'Languages' );
		}

		if( $text === 'URL(s)' ){ //metabox header
			$translation = __( 'Language(s)' );
		}
	}

	return $translation;
}

add_filter( 'submit_resume_form_fields', 'smyles_custom_frontend_exp_edu_links_fields', 1 );
add_filter( 'resume_manager_resume_links_fields', 'smyles_custom_repeatable_admin_links', 1 );

function smyles_custom_repeatable_admin_links( $fields ){

	$fields = array(
		'language' => array(
			'name'        => 'resume_languages_language[]',
			'label'       => __( 'Language' ),
			'type'        => 'select',
			'required'    => true,
			'placeholder' => '',
			'priority'    => 1,
			'options'     => array(
				'' => __( 'None' ),
				'English' => __( 'English' ),
				'Italian' => __( 'Italian' )
			)
		),
		'level' => array(
			'name'        => 'resume_languages_level[]',
			'label'       => __( 'Level' ),
			'type'        => 'select',
			'required'    => true,
			'placeholder' => '',
			'priority'    => 2,
			'options'     => array(
				'' => __( 'None' ),
				'Beginner'     => __( 'Beginner' ),
				'Intermediate' => __( 'Intermediate' ),
				'Advanced'     => __( 'Advanced' ),
				'Native'       => __( 'Native' )
			)
		)
	);

	return $fields;
}

function smyles_custom_frontend_exp_edu_links_fields( $fields ){

	if ( ! isset( $fields['resume_fields'], $fields['resume_fields']['candidate_education'], $fields['resume_fields']['candidate_experience'], $fields['resume_fields']['links'] ) ) {
		return $fields;
	}

	$fields['resume_fields']['links'] = array(
		'label'       => __( 'Language(s)' ),
		'add_row'     => __( 'Add Language' ),
		'type'        => 'links', // repeated
		'required'    => false,
		'placeholder' => '',
		'description' => __( 'Optionally provide languages and level for each.' ),
		'priority'    => 10,
		'fields'      => array(
			'language' => array(
				'label'       => __( 'Language' ),
				'type'        => 'select',
				'required'    => true,
				'placeholder' => '',
				'priority'    => 1,
				'options'     => array(
						'*'		  => __( 'Please select a language' ),
						'English' => __( 'English' ),
						'Italian' => __( 'Italian' )
				)
			),
			'level'  => array(
				'label'       => __( 'Level' ),
				'type'        => 'select',
				'required'    => true,
				'placeholder' => '',
				'priority'    => 2,
				'options'     => array(
					'*' => __( 'Please select a level' ),
					'Beginner' => __( 'Beginner' ),
					'Intermediate' => __( 'Intermediate' ),
					'Advanced' => __( 'Advanced' ),
					'Native' => __( 'Native' )
				)
			)
		)
	);

	return $fields;
}