How to use Translator:Translate?

I'm trying to translate "Hi" to Spanish, and then print the result, but "Hi" always prints. Is there something I'm missing? This is a LocalScript and it's parented under a TextBox.

local spanish = game.LocalizationService:GetTranslatorForLocaleAsync('es')

print('Translators retrieved!')

local translated = spanish:Translate(script.Parent, 'Hi')

print(translated)