How to say Hello (formal) in German language, study the correct pronunciation and look for the words analysis.
hallo (ich wünsche einen) guten Tag servus moin grüß Gott means Hello (formal) in German language
Translating each word from German to English the meaning is:
hallo (ich wünsche einen) guten Tag servus moin grüß Gott
hello “I wish [you] a good day!”