The Celtic languages are a group of Indo-European languages spoken in the Celtic nations, including Ireland, Scotland, Wales, Brittany, and the Isle of Man. There are six living Celtic languages: Irish, Scottish Gaelic, Welsh, Breton, Cornish, and Manx.
The word “by” can be translated into Celtic languages in a number of ways, depending on the context. In Irish, the most common way to say “by” is “ag” or “le”. In Scottish Gaelic, the most common way to say “by” is “le”. In Welsh, the most common way to say “by” is “gan” or “trwy”. In Breton, the most common way to say “by” is “gant” or “dre”. In Cornish, the most common way to say “by” is “gans” or “dre”. In Manx, the most common way to say “by” is “lesh” or “er”.