Manual:$wgTranslateNumerals/en

Details
For Hindi, Arabic, and other languages with their own numeral systems, use local numerals instead of Western style (0-9) numerals in some areas of the interface.

See a list of languages using it, with this search: https://phabricator.wikimedia.org/diffusion/MW/browse/master/languages/messages/?grep=digitTransformTable

Examples (1-3):
 * km: ១,២,៣,…
 * gu: ૧,૨,૩,…
 * zh-classical: 一,二,三,…
 * ar: ‎…,٣,٢,١