Labels should be only fill for names in latin scripts,
to let contributor in other scripts take responsibility
to use or not translitteration.

This is a follow-up for acaa81ab.

Test procedure

• ./create_surname <some name>
• ./create_given_name <some given name>

Test items

• Surname: https://www.wikidata.org/wiki/Q25938837
• Given name: https://www.wikidata.org/wiki/Q25938836