Created attachment 63957 [details]
Translate "loading" in the opening xlsx file.
Traduzir "loading" na abertura de arquivo xlsx.
Unless this text string is translated in the pt_BR localization package but do not appear translated, or text string not marked for translation at all, it shouldn't be considered as a bug.
pt_BR i18n team would take care of the UI translation update.
Feel free to reopen if you disagree.