Talking to the support team:
We technically have support today! Tagalog (tl) was added to our list of translations in late 2023 but has not yet made its way to the management dashboard. You can enable it as a supported language via API, and then they can test it by use the following url for one of their applications
https://{APP_DOMAIN}/authorize?client_id={CLIENT_ID}&response_type=code&prompt=login&scope=openid%20profile&redirect_uri={CALLBACK_URL}&ui_locales=tl
They can also edit any of the key/values using the API Auth0 Management API v2