As of server version 3.4 (max wire version 5), a collation option is supported for some commands. Helpers for the following commands therefore must be updated:

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

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

Note that the driver must not automatically add a collation to any of the Bulk Write Models; the user must explicitly provide the collation to each.