Whenever you are referring to something formally, you must always use the usted form. Therefore "How are you" Would be "Cómo está usted?"
"Chigau" or more formally "chigaimasu"
You can say "¿Dónde estás?", or more formally, "¿Dónde está usted?"
The phrase "all right" in Russian can be translated to "всё в порядке" (vsyo v poriadke) or "хорошо" (khorosho).
"Danke" or, more formally, "Dankeschön." Just like in Germany
No, the word better is an adjective. An adjective has degrees: good, better, best.If the noun being described is more than 'better' it is 'best'. If there are others that are also more than 'better', terms like 'one of the best' or 'among the best' can be used.
Generally: "Proost!"(Cheers!).More formally: "Op uwgezondheid!"(literally: To your health!).
It belongs to him : c'est a lui, or more formally : ca appartient a lui
good morning = "Guten Morgen." or more formally "Einen schönen guten Morgen."
厕所 [cè suǒ] or 盥洗室 [guàn xǐ shì] more formally
Comment allez-vous?
You could say "five and a half" or more formally "five and five tenths"
Depending on how close you are to the person : "Das darfst Du nicht!" Or more formally : "Das dürfen Sie nicht!"