Could anybody know of/recommend a psychologist or psychotherapist in Geneva for couples who is fluent in English

please PM me

thanks!

Try asking the Swiss Psychological Society for a registered members list http://www.unifr.ch/psycho/sgp-ssp/.
Those registered will have to abide by the society rules of ethics and conduct. If not you can complain and have mal-practice investigated, which gives you some peace of mind.

I do not think Psychologist is a protected vocation here, so anyone can call themselves a psychologist and take your money, so better to be safe and get advice from the professionals.