Manual:$wgTranslateNumerals

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