Dumbledore the Parselmouth?

[genma99]

No: HPFGUIDX 134418

In the first visit that Dumbledore & Harry take into the Pensieve, they 
go to the Gaunt's house as a member of the Ministry is arriving.  The 
Ministry member does not understand what is being said but Dumbledore 
helps Harry figure out that Parseltongue is being used.  With that in 
mind, how does Dumbledore understand the conversations that ensue 
within the house?  He seems to have an extraordinary knowledge of the 
events inside and the conversations they are having to be guessing what 
is being said...  that said, Dumbledore must be a Parselmouth.  
Thoughts?

Genma