I would highly recommend contacting master jeweler Wilfey MacManus,
who's an Irish native and who specializes in jewelry with Celtif
motifs. He's deeply immersed in Irish language and culture, and if
he couldn't answer your questions, he could probably refer to you
someone who could.
Wilfey's located in Berkeley, CA and his website URL is:
By the way the Irish call their language Irish rather than Gaelic,
as in, "Do you speak Irish?"