English and French in Guadeloupe
I was living in Guadeloupe years ago. There is people not open to help you in English, mostly the ones you will see on a street in case you have to ask for direction. You have to remember that on this island, plenty of people do not speak english or have a limited english.
Once you go to restaurant and tourist place, you should be fine.
Even if you say Bonjour comment ca va (Hi, how are you doing) and next speak english for asking direction, people will continue to give hard time by speaking French. Those people think that if you come on THEIR island you have to speak only french. It is a sort of way of life made in France. They just like to make it difficult.
This is one of the reasons why Guadeloupe do not attrack lot of tourists and they suffer from that.
You will see Martinique more friendly as well as St Martin (French side) and St Barthelemy.