How can I connect a text translation service?

Question

Google

I am writing my bot for the site and one of the important services that I wanted to stick is text translation.
I started looking and was very surprised, google api translate is closed for free, yandex api translate is also paid (free 1,000,000 characters per day, 10,000,000 per month, but I don’t know about the scale and therefore I don’t know how much more will be translated, but suddenly a bot bombs, it will be very unpleasant, but limiting users is somehow not very good.)
What service can be used for free and to translate normally?
If possible, examples in php)

Answer 1

1,000,000 characters is the size of 2 medium size books.
If your service operates with larger volumes, it is logical that you should have monetization and, accordingly, the ability to pay for a third-party api, especially since the prices of the same Yandex are more than affordable https://translate.yandex.ru/developers/prices
There are no free services.

Answer 2

Maybe there is an answer - Translate API. Good and free - a myth?