how can i improve the portuguese brazilian translation of Openfire?
That’s the file you need to update Openfire/openfire_i18n_pt_BR.properties at master · igniterealtime/Openfire · GitHub . If you are familiar with Github, you can provide a pull request with updated translation. Note that non-latin characters are replaced with unicode codes (e.g. \u00e7). You need to replace such characters with codes. Or some editors do this automatically.