"… have enquired about the availability."
"… could be signing by…"
Very non-committal. They link a specific name and then say could. It's possible. Ronaldo COULD be signing. He's not, but whilst both us and he exist it could happen. The very nature of using words like could put no pressure on rumour maker, by keeping it very informal and leaving lots of open ends.
"(insert country) Ace Jetting In for Talks"
What the first part implies is all they know is that said player is from said country. Jetting in makes it sound like he's speeding his way to get here now, rather than actualy getting a flight to East Mids Airport, to have a chat in an airport about what wage he'd like. I love it when nondescript foreign players get linked and all they can do is mention his nationality, and not even a position..