Category:ISO 15924:Olck

This category lists languages which use the Ol Chiki (Ol Cemet’, Ol, Santali) script (or ol tchiki in French), coded Olck or 261 in ISO 15924 since 2007-07-02 [typology: alphabet, unicameral; main direction: ltr], supported by Unicode since version 5.1 with the alias Ol_Chiki (ref. : Ch13.10). See also Wikipedia:en:ISO 15924:Olck, Wikidata:Q201688.
You can render that script on your system with the following fonts (in order of coverage): 'Noto Sans Ol Chiki', 'Nirmala UI', sans-serif.