Tell sth thank you

Dobrý den,

chtěl jsem se zeptat, lze v angličtině říci “Please, tell them I say thank you very much” Když chci, aby někdo za mě vzkázal, že někomu moc děkuji, aby vzkázal mé velké poděkování? Vím, že se dá normálně použít “Tell them I say thank you”, tak jsem se chtěl zeptat, když tam přidám “very much”, jestli to nebude znít nějak nepřirozeně nebo kostrbatě 

Třeba “Please, tell them many thanks from me” asi není správně, je to tak?

Děkuji moc

“Please, tell them I say thank you (very much)” – nothing grammatically wrong with this (except for the Slavic comma after "please” in this kind of ‘making a request’ context when it's an adverb, not an interjection), but it's not idiomatic (doesn't sound natural) – in Czech either: řekněte jim, že říkám děkuji . [“Please tell them I say thank” gets only 7 hits on Google.]

“Please tell them many thanks from me” (without the Slavic comma after “please”) is fine. You can also say “please give them my grateful thanks for ( + ing form, or noun )” or “please tell them how grateful I am/was for …” or “please thank them very much on my behalf (for … + ing form or noun …).”

Please, no comma after please
Should you write Please, send me your comments or Please send me your comments? The version without a comma is correct. If you put a comma after please, it sounds as though you are irritated and impatient: Oh, for heaven’s sake, just send me your comments will you: you’ve kept me waiting long enough! So remember: no comma after please! (Quick Tips)

Ok, thanks a lot, DesperateDan!