1. My word is my bond¹.

我说话算话。

2. He never goes back on his word.

他从不食言。

go back on one's word 食言

3. Don't break your promise.

不要违背诺言。

break one's promise 违背诺言

4. It's my call.

我说话算话。

5. He often fails to keep his word.

他经常不信守承诺。

keep one's word 守承诺

fail to do 不能做到某事

6. He is always been a man of his word.

他从来都是个言而有信的人。