Firebase error messages in different languages?

Question

Showing the Firebase error messages (error.message) in the view results in english error descriptions (e.g. for Authentication errors, if user credetials contain errors).

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Answer 1

This is impossible right now. What I recommend is to use the erros code (error.code) that is a unique error code and with that you can create something to bind this errors code to your own text/language. There is an available page at Firebase documentation that have a list of those errors code that might help you with that. Check out these links: https://firebase.google.com/docs/reference/js/firebase.auth.Auth https://firebase.google.com/docs/reference/js/firebase.auth.Error https://firebase.google.com/docs/auth/admin/errors?hl=en

Edit: To solve this, I have translated it by myself (to PT-BR, my language) and implemented (in TypeScript) with these steps:

I have created an interface to hold the indexed array of string:

export interface MessagesIndex {
    [index: string]: string;
}

Then in some UI or Error Service, I've declared this variable as the Interface above:

params = {
        'invalid-argument': 'Erro: Um argumento inválido foi fornecido.',
        'invalid-disabled-field': 'Erro: O valor fornecido para a 
          propriedade de usuário é inválido.',

         /* ADD HERE THE OTHERs IDs AND THE CORRESPONDING MESSAGEs */

    } as MessagesIndex;

After that, I've created a function to print it by the given code (from Firebase), remember to split because the error.code atribute comes like "auth/error-id" and what we only need here is the "error-id", and if the error code is not found, then you can return some "Unknown error" and print the error.code, if you want:

   public printErrorByCode(code: string): string {
        code = code.split('/')[1];
        if (this.params[code]) {
            return (this.params[code]);
        } else {
            return ('Ocorreu algum erro desconhecido! \n Codigo erro: ' + code);
        }
    }

It's not the best code but I hope it helps!