Hello
it's not possible to read manuels in Emulationstation. Not yet.

You need to read manuel with you comptuer > share network.

You two can already start the translation of the system. The file is located here : https://github.com/digitalLumberjack/recalbox-emulationstation/blob/recalbox-buildroot/locale/lang/fr/LC_MESSAGES/emulationstation2.po and your files are located https://github.com/digitalLumberjack/recalbox-emulationstation/blob/recalbox-buildroot/locale/lang/es/LC_MESSAGES/emulationstation2.po and here https://github.com/digitalLumberjack/recalbox-emulationstation/blob/recalbox-buildroot/locale/lang/pt/LC_MESSAGES/emulationstation2.po Juste copy the new text from the fr one, and translate in your language. Then email that to me 🙂