Thread:Comments:French broadcasters barred from saying "Facebook" or "Twitter" on air/Really?/reply (6)

Remember that the BBC has rules about this too, although they aren't always strictly followed. Blue Peter famously had to refer to Sellotape as "sticky backed plastic", and there's the stock phrase "other brands are available".

Of your examples thermos and hoover are well genericised now anyway. The others it will depend on context.