Hello Thiago, this can be done via the
Metadata Localization feature, which is most commonly used to localize the entire workspace to different languages.
Alternatively, you can also go to Manage > Attributes and select the desired date attribute. You can rename it from there. From then on, any insights using this attribute will have its new name. This is simpler if you are not looking to translate the whole workspace, but rather only have the language change on the insights, for example.