Translation of nämlich

I am asking you to give me a reply as soon as possible so that we can proceed. Have you ever tested the new version? Many users are waiting for it, and are sending me lots of emails about it.
True, I forgot the 'I' when I have copied and pasted the entire text field. I assume it is the regular form, isn't it? However, the formal form in Spain is a little different to what we are using in Mexico.
Hello, my name is Rick and I come from Mexico, I live in the capital Mexico City which is located in the center. I speak Spanish and German as my mother tongue and I can help you with either one.