Replace multiple characters at once

[emilianobora]

Hello. I dont want to remove. I want to replace lowercase and uppercase spanish characters, e.g. "á", "Á", "ñ" and "Ñ" to "a", "A", "n" and "N" or "Mañana lloverá" to "manana_llovera". How can I do this at once and not in multiple steps? Thank you very much.

[therube]

14:Special -> Character (Translations)