Hey @rafaeliga thanks for reporting this!

I can implement if there is a direction on how or where to set the message to translate.

I'll try to summarize an approach:

1. Add a key for this translation on lib/generators/avo/templates/locales/avo.en.yml
2. Run i18n-tasks add-missing to automatically add the same key on all locale templates
3. Translate those using chat GPT or other reliable translation tool
4. Add uploadWarning: String, to trix_field_controller.js values (here)
5. Use that value on translation by replacing "You can't upload files into the Trix editor until you save the resource." with this.uploadWarningValue
6. Pass the translated key as value here like: upload_warning: I18n.t("avo.the_key"),

Thank you for taking the initiative ane let me know if you hit any obstacles.