Two other branches of the indo-european language and celtic.

Greek

Explanation:

Latin is part of a different language family, but Greek and Celtic are both from the Indo-European language family

faithful servants eumaeus and philaetius:

his ragged vest then drawn aside disclosed the sign conspicuous, and the scar exposed: eager they view'd, with joy they stood amazed with tearful eyes o'er all their master gazed:

these servants know ulysses by the scar he got when he was a child - so when he showed them the mark, they immediately knew this is truly their master and they hugged him, finally starting to believe his words.

to inform the reader that the text will take a second look at the grimms’ original tales