If your budget would stretch to it, how about La Réunion?
No language barrier. Chikungunya seems to have died down, and little risk in their winter anyhow. Longish flight but no jetlag due to not crossing many timezones. Sunny but not too hot in July/Aug, no cyclone risk, you can alternate slobbing beach days and more active ones visiting the volcano/ mountains/ waterfalls/ forest acrobatics park things, or some of you can do one type of thing, some another.
I lived there for 10 years, and have friends with a lovely house (3/4 bedrooms with pool), near Saint Pierre which they sometimes rent cheapish to friends in the summer while they're in France. I could ask. You can fly from Paris or Toulouse, I'm certain, not sure where else as the airlines chop and change destinations. Avoid Air France, too expensive, try Air Austral or the other one (forgotten its name...)