Old PrussianA 306 km
The only substantially attested West Baltic language, spoken in historical Prussia around the Sambia peninsula — today's Kaliningrad Oblast and north-eastern Poland. Extinct since the early 18th century, after the 1709–1711 plague; attested in three 16th-century catechisms and the Elbing vocabulary, with a modern reconstruction movement.EN
Romaní polaco-bálticoA 372 km
Una variedad romaní del norte enraizada históricamente en Polonia y la región báltica, modelada por un largo contacto con lenguas eslavas y bálticas.
LivonianA 373 km
A Finnic Uralic language of the Livonian Coast of Courland, Latvia. The last fluent native speaker died in 2013, but an active revival sustains a small community of second-language speakers, supported by the University of Latvia Livonian Institute. Notable for its stød-like broken tone, rare among Uralic languages.EN
Polaco estándarA 393 km
El estándar polaco basado en Varsovia. La lengua oficial de Polonia y la mayor lengua eslava por hablantes dentro de la Unión Europea.
KashubianA 458 km
A West Slavic minority language of Pomerania in northern Poland, centred on Kashubia. Closely related to Polish but with its own literary standard, orthography, and strong regional identity.EN
EstonioA 529 km
Una lengua urálica fínica y lengua oficial de Estonia. Estrechamente emparentada con el finés, pero distinta en vocabulario y con un sistema casual parcialmente reestructurado.