I was wanting to book a different plane company for my return journey?

I am flying from glasgow and i can book the same company for there and back but the plane leaves really early on the way back. So i was looking to use a different company on the way back that leaves in the evening. When I attempted to try this, it was in French as this is where I am going. Any help|||All of those sites have English versions, especially if it was Air France. Look at the website and there will be a place to click on English version.