How can you write Le shana tova ticatev vetechatem in hebrew?

מה שלומך It is

First you learn the Hebrew alphabet, then you learn the language (words, grammar, etc.), just as if you were learning English, Spanish, Russian or Japanese.

You can write to anyone who understands Hebrew. אתה יכול להתכתב עם כל מי שמבין עברית

Father of the Hebrews = אב העברים

You have some options: ברנדינא יענטיי ברנדינא יענתיי Also, wherever there is a "א" you can substitute a "ע" and vice versa.