I’m a beginner learning French and I noticed two words in my lesson: football and week‑end. I have a few related questions and would appreciate simple explanations and examples.

Are these words borrowed from English?

Why is there a hyphen in week‑end? In English it’s usually written weekend (one word).

I understand the sports of football came from England, so they use the English word 'football.' But the concept of 'weekend' may have existed from a long time ago, so there might be a native French word meaning weekend. Why use week‑end instead of a native French phrase?