change language zabbix-server using docker

I have a problem I am trying to change the language of zabbix in Spanish using docker but I have not been able to do so and I have been investigating the examples that are found in apache2 and in docker if someone could help me or guide me how to change the language of zabbix in docker would be very grateful down I leave my code that works well.

of docker-compose:

version: '2'
services:
  zabbix-db:
    image: monitoringartist/zabbix-db-mariadb
    volumes:
      - zabbix-db-storage:/var/lib/mysql
      - backups:/backups
      - /etc/localtime:/etc/localtime:ro
    environment:
      - MARIADB_USER=zabbix
      - MARIADB_PASS=my_password
  zabbix-server:
    image: monitoringartist/dockbix-xxl:latest
    depends_on:
      - zabbix-db
    ports:
      - "80:80"
      - "10051:10051"
    volumes:
      - /etc/localtime:/etc/localtime:ro
    links:
      - zabbix-db:zabbix.db
    environment:
      - ZS_DBHost=zabbix.db
      - ZS_DBUser=zabbix
      - ZS_DBPassword=my_password
volumes:
  zabbix-db-storage:
    driver: local
  backups:
    driver: local

I would really appreciate the help of this beautiful community community I leave an example of what I want to do in docker:
link