Dear Tigran
I resolved my issue now. I think it doesn't due to I used multiple account as we only have used to be a single account. Yes, it is the business google account created by a service provider. I performed the following and it works after (need to do on each google spreadsheet I created):
1. Open an incognito browser i Chrome. Perform once the steps required (disable auto translate, choose language, etc)
2. Perform once the "translate" on a cell.
3. Go. back to another normal browser in chrome, then translate works!!
Walter