si: Sinhala language
Verify this language code:
✔ si is a well-formed language code. 
✔ This seems to be a code for an actual language.
✔ This language code is enabled on Translatewiki.
MediaWiki core messages: 50.28 %: 1975 / 3928 messages
Most important messages: 90.31 %: 522 / 578 messages
Collection extension: 1.69 %: 3 / 178 messages
ProofreadPage extension: 24.86 %: 46 / 185 messages
Android Wikipedia app: 6.17 %: 135 / 2188 messages
iOS Wikipedia app: 1.0 %: 18 / 1802 messages
Main extensions used by Wikimedia: 12.96 %: 923 / 7121 messages
Most important messages: 90.31 %: 522 / 578 messages
Collection extension: 1.69 %: 3 / 178 messages
ProofreadPage extension: 24.86 %: 46 / 185 messages
Android Wikipedia app: 6.17 %: 135 / 2188 messages
iOS Wikipedia app: 1.0 %: 18 / 1802 messages
Main extensions used by Wikimedia: 12.96 %: 923 / 7121 messages
✔ This language code is available for general use in MediaWiki.
✔ This language is available for general use on Wikidata.