Is it possible to use the Google_Translate Api Key without a billing account?

Question

Is it possible to use the Google_Translate Api Key without a billing account?

I created an ApiKey in the cloud.google.com.
I'm trying to activate ApiKey cloud.google.com
I get the message:
"Cloud Translation API requires a project with a billing account."

If I understood correctly, then I have to enter my payment details
I don't want to enter my payment details.

Question 1: Is it possible to use ApiKey Google_Translate without a billing account?

Question 2: What services does Google provide for translating text from one language to another for free?

The purpose of the question:

• develop a text-based application that will translate text from one language to another;
• The application will use Google services to translate the text.
• The application is supposed to be used for personal purposes. For training.
• the application will be developed using C#(.NET7)

Answer 1

You can send a request to translate.google.com which generates a file named "json.txt" in JSON format, that you can parse.

Main parameters are :

q="sentence to be translated"

sl=source language

or

sl=auto

tl=translation language

For example, with a french sentence "ma voiture est tombée en panne" :

(link is cutted by editor, do copy-paste of the 2 lines...)

https://translate.google.com/translate_a/single?client=gtx&sl=auto&tl=en&dt=t&q="ma voiture est tombée en panne"

generates "json.txt" file with the translation "my car broke down"