Final answer:
The primary language for communicating with Apache Cassandra is the Cassandra Query Language (CQL), which is similar to SQL and is used to manage and query data within the database.
Step-by-step explanation:
The primary language for communicating with the Apache Cassandra database is the Cassandra Query Language (CQL). CQL is a SQL-like language that enables users to interact with Cassandra in a way that is similar to other database query languages. It allows for the creation, modification, and querying of data. Users can perform various actions such as creating keyspaces (analogous to databases in relational database management systems), defining tables, inserting data, and executing queries.