How do you say be well my friend in Gaelic?

There isn't one single perfect translation for "Be well, my friend" in Gaelic, as the best choice depends on which Gaelic you mean (Scottish Gaelic or Irish Gaelic) and the level of formality. However, here are a few options:

Scottish Gaelic:

* Bi slàn, a charaid: This is a fairly literal and common translation. "Bi" means "be," "slàn" means "whole" or "healthy" (implying well), and "a charaid" means "my friend."

* Beannachd leat, a charaid: This translates to "Blessings to you, my friend," which conveys a similar sentiment of well-wishing.

Irish Gaelic:

* A bheannacht ort, a chara: This is the equivalent of the Scottish Gaelic "Beannachd leat, a charaid," meaning "Blessings on you, my friend."

* Bí slán, a chara: This is the Irish equivalent of the Scottish Gaelic "Bi slàn, a charaid."

All of these options are suitable. The phrasing with "beannachd" (blessing) is perhaps slightly more formal and heartfelt than simply "be well." Choose whichever feels most appropriate for your context.