Of the following places, I have only been to the last. None of them satisfy all your requirements, but perhaps you can find something beneficial at one or more of them.
You might want to look at
St. Ceciliaās on the Isle of Wight. It is an abbey of Benedictine nuns. Their guest accommodation is self-catering and it is unclear whether they welcome only women in their guesthouse, but everything else about them seems to tick all your boxes.
https://www.stceciliasabbey.org.uk/site.php?menuaccess=21
Note that
Buckfast is community of monks. If you go there for a guided retreat, your guide will most probably be a man. The retreat center provides meals and accommodates both women and couples (men coming alone stay in the monastic guesthouse), so there will likely be male guests around if you go there.
Pluscarden Abbey (Benedictine monks) in Scotland has a guesthouse exclusively for women. Men stay in a separate building. Retreats there are individual and unguided, and meals are self-catering although ābasic foodstuffs such as tea, coffee, muesli, porridge, margarine, bread, milk and eggsā are provided. The closest town where you can buy other items is six miles away from the abbey (Elgin).
Finally, the
Abbaye Notre-Dame de Wisques near Saint-Omer, France is a community of Benedictine nuns (Abbaye Saint-Paul, just around the corner, houses the monks). All retreatants, male and female, reside in a single guesthouse. Retreats are individual and unguided. Meals are provided: breakfast is taken in the guesthouse kitchen while lunch and dinner are served in the guest dining room in the main building. I donāt know for a fact if any of the nuns speak English

but I would be surprised if there werenāt at least one with basic command of the language.
http://arras.catholique.fr/abbaye-wisques