Describe the feature and the current behavior/state.
The extension google-translate doesn't provide a proxy option. However, the npm package google-translate-api obviously supports this feature, and here is the usage: Google-translate-api-proxy
Who will benefit with this feature?
Google Translate has request limits. If too many requests are made, you can either end up with a 429 or a 503 error.
And as for me, I can't get any result because I am a Chinese user, I can't connect google without proxy.

@ospfranco