@pedronapoleaojr You need to add a translation file here for your language (If It does not  already exist for your language). For Example: We have added messages.en.yml for english here. https://s3-ap-southeast-1.amazonaws.com/cdn.uvdesk.com/website/3/202002075e3cec5d9e4d3translationfile.png Now make a entry for your locale in uvdesk.yaml file. And Finally check your choice language by passing it into url. https://s3-ap-southeast-1.amazonaws.com/cdn.uvdesk.com/website/3/checkTranslation.png Now you can make it your default language. Locate file config->packages->translation.yaml  open translation.yaml  and make changes as given below. default_locale:    your_locale(en, ar etc)       fallbacks:                         -  your_locale(en, ar etc)     Clear your project cache by:   php bin/console c:c