Translation for (GM) Munster Irish of "always laughing" and also "just keep laughing" separately. Thank you!

I don't know if this is something that would differ in Munster. For "Always laughing" I'd suggest "Ag gáire i gcónaí."

Wait for more input, please.

Redwolf

What Red offered is good. Your second item would probably end up needing more words in Irish, since concepts like "just" or "only" need more then one word in Irish.

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I'm not a native (or entirely fluent) speaker, so be sure to wait for confirmations/corrections, especially for tattoos.