Yola
When the Anglo-Normans landed at Bannow in 1169 they brought a form of Middle English with them. In most of Ireland that language got absorbed, replaced, or evolved into the regional Hiberno-English the country speaks now. Inside the baronies of Forth and Bargy - the southeast peninsula that contains Tagoat - it did neither. Hemmed in by sea, by Wexford town, and by a deep local sense of being separate, the dialect stayed put and went its own way for six hundred years. By the time Jacob Poole was collecting its vocabulary in the early 1800s, Yola was a distinct tongue - recognisably English at the root but with its own grammar, its own vowels, and a lot of words other English speakers had never heard. Yola died as a living speech around the mid-1800s. Recent decades have seen small revival efforts, a glossary or two, a few signs. The graveyards of Forth and Bargy parishes are where the language is most physically present now - the surnames are still the ones Poole wrote down.