"Slàinte a charaid."
This is fascinating! I know that in Irish Gaelic 'cara' is the for friend. Here in Brazil we also use 'cara' for friend, it doesn't matter the gender. Portuguese is related to the Celtic Languages too. There are theories that say the Celts had been to Brazil before the Portuguese.
i mean, Celtic languages and Portuguese are both Indo-European languages, but that's about the extent of it. Portuguese is a romanse language. The Celtic or proto-Celtic languages spoken in Iberia probably influenced early Portuguese to some extent, but they are not particularly close cousins.
Indeed. Portuguese is a Romance language because the Roman Empire dominated everything, however, the ancient Galicians' dialects gave Portuguese many words and characteristics. A very important one is that Latin languages answer questions with a yes or no, whereas Portuguese can also answer them by using the same verb: Ex.: Jantaste? (Did you have dinner?) - Jantei (Yes, I did)/ Não jantei (No, I didn't.) just like in Gàidhlig, Gaeilge and other Celtic languages. If you see the genealogy of languages, Portuguese has a connection with the Celtic languages, especially with the Goidelic ones. Moreover, according to some experts, other characteristics such as the sound of S, the nasalisations, the loss of some letters, the lenitions and attenuations, the differences in pronunciation for the same letter are all Celtic heritage in Portuguese, not to mention the cultural ones. And we cannot forget Portuguese is called "the last flower of Lazio" and is the most distant language from Latin after French.