What is the Celtic translation of smart?

There isn't a single, universally accepted Celtic translation for "smart." Celtic is not a single language, but a family of languages with many branches (Irish, Scottish Gaelic, Welsh, Breton, Cornish, Manx, etc.), each with its own vocabulary and nuances. The best translation would depend on the *kind* of smartness you mean and which Celtic language you're targeting.

To get a translation, you would need to specify:

* Which Celtic language? (e.g., Irish Gaelic, Welsh, Scottish Gaelic)

* What aspect of "smart"? Are you talking about intelligence, cleverness, wit, being quick-witted, stylishness (as in "smart clothes"), or something else?

For example:

* Intelligent: You might use words related to "wise" or "clever" in the various Celtic languages.

* Clever/Quick-witted: Words suggesting cunning or shrewdness would be appropriate.

* Stylish: This would require a completely different approach, focusing on words related to fashion and appearance.

Without this specificity, providing a translation is impossible.