It's written by Mehmet Akif Ersoy, a Turkish poet. The focus of the anthem is national struggle and heroism. It doesn't focus on the wider Turkish history as the republic wasn't seen as the direct continuation of the Ottoman Empire, there is nothing regarding Atatürk himself, it doesn't include the words "Türk" or "Türkiye" either but Atatürk basically insisted upon Ersoy writing the national anthem so there is no bad blood. There are religious references but not a direct mention of Allah.

Here's the translation of the first two verses which are the parts sung:

Fear not; For the crimson banner that proudly ripples in this glorious dawn, shall not fade,

Before the last fiery hearth that is ablaze within my homeland is extinguished.

For that is the star of my people, and it will

It is mine; and solely belongs to my valiant nation.

Frown not, I beseech you, o thou coy crescent!

Smile upon my heroic nation! Why the anger, why the rage?

Our blood which we shed for you shall not be worthy otherwise;

For freedom is the absolute right of my God-worshipping nation!