The word "triumphant" has at least two different meanings in English, so there are two words you could use for it in Scottish Gaelic (
Gàidhlig), depending on the intent:
buadhmhor, in the sense of being victorious (i.e. the factual situation), and
caithreamach, in the sense of being exultant (i.e. how one feels about the situation)
This site gives good explanations for pronouncing the sounds of
Gàidhlig. It has audio files you can download to hear the pronunciation and also shows the sounds using the International Phonetic Alphabet (IPA), which I am not good at:
http://www.akerbeltz.org/fuaimean/fuaimean.htm#BeurlaHowever, here is a rough guide for these two words (in both cases, strong emphasis on the first syllable):
buadhmhor BOO-ugh-wurr
"gh" = a guttural sound deep in the throat, using your larynx
caithreamach KATH-yeh-mukh
"KATH" as in the name Kathy, with American pronunciation
"kh" = a guttural sound like the one above, but not using your throat/larynx
The "th" in the
Gàidhlig is silent, and then the "r" becomes a light "th" sound]
I'm still a learner, so be sure to get input from others, especially for tattoos.