As of server version 3.4 the following commands support collation argument:

• create
• createIndexes
• aggregate
• count
• distinct
• find (command only)
• findAndModify
• geoNear
• group
• mapReduce
• remove (command)
• update (command)

The driver must not automatically add a collation to any of the Bulk Write operation; the user must explicitly provide the collation to each.

See spec changes in:

• https://github.com/mongodb/specifications/blob/master/source/crud/crud.rst
• https://github.com/mongodb/specifications/blob/master/source/index-management.rst