凯西：我们准备好卫冕非洲杯，会从第一场比赛就全力以赴（凯西：我们已整装待发冲击非洲杯卫冕，首战就会全力争胜）

Considering translation options

I think it’s a good idea to provide a clear English translation while also offering more options for the user. The user mentioned Kessie’s message about defending the AFCON title, which I can translate as is. I’ll spell out “Africa Cup of Nations” for clarity and decide to provide both the translation and a brief summary. Then I'll ask how they'd like to proceed by giving them numeric options for further processing. That way, it's informal yet helpful!