Hi Cuong,
You can sign up for Azure Free:
https://azure.microsoft.com/en-ca/free
You need to use a Credit Card to sign up. Then when your trial period is over (30 days) it will ask you whether you want to continue and change to a pay-as-you-go plan. If you don't, your subscription will be disabled. You can also choose to close the account after:
Cancel your Azure subscription
https://learn.microsoft.com/en-us/azure/cost-management-billing/manage/cancel-azure-subscription
Once you have an Azure Subscription, you can create an Azure AI Translator service.
Create a Translator resource
https://learn.microsoft.com/en-us/azure/ai-services/translator/create-translator-resource
If this is helpful please accept answer.