Change language of URL on generateEmailVerificationLink() FirebaseAdmin SDK

Question

I want to change the language of the link that was generating the function generateEmailVerificationLink (), I tried admin.auth().LanguageCode = 'es', but it didn't work.

This is my code:

  // Function for creating to validation link with firebase admin
async getLinkForEmailVerification(email) {
    admin.auth().languageCode= 'es';
    const actionCodeSettings = {
        url: 'http://localhost:4200/login',
    };

    return admin.auth().generateEmailVerificationLink(email, actionCodeSettings).then((link) => link);
}

I'm using firebase admin with node.js

Answer 1

Custom it by manually way - Appending lang parameter to the link:

async getLinkForEmailVerification(email) {
  const actionCodeSettings = {
    url: 'http://localhost:4200/login',
  };

  let link = await admin.auth().generateEmailVerificationLink(email, actionCodeSettings);
  link += '&lang=es'; // this line

  return link;
}