Question: How far south is Didxsaj spoken?
Context: Oto-Manguean languages (also Otomanguean) are a large family comprising several subfamilies of indigenous languages of the Americas.  All of the Oto-Manguean languages that are now spoken are indigenous to Mexico, but the Manguean branch of the family, which is now extinct, was spoken as far south as Nicaragua and Costa Rica.  Oto-Manguean is widely viewed as a proven language family.  However, this status has been recently challenged (Brown 2015). Ventureño is a member of the extinct Chumashan languages, a group of Native American languages previously spoken by the Chumash people along the coastal areas of Southern California from as far north as San Luis Obispo to as far south as Malibu.  Ventureño was spoken from as far north as present-day Ventura to as far south as present-day Malibu and the Simi Hills, California.  Dialects probably also included Castac and Alliklik (Campbell 1997:126). The Maritime Archaic is a North American cultural complex of the Late Archaic along the coast of Newfoundland, the Canadian Maritimes and northern New England.  The Maritime Archaic began in approximately 7000 BC and lasted into the 18th century.  The culture consisted of sea-mammal hunters in the subarctic who used wooden boats.  Maritime Archaic sites have been found as far south as Maine and as far north as Labrador.  Their settlements included longhouses, and boat-topped temporary or seasonal houses.  They engaged in long-distance trade, as shown by white chert from northern Labrador being found as far south as Maine. Myoporum acuminatum, commonly known as waterbush, pointed boobialla or mangrove boobialla, is a flowering plant in the figwort family Scrophulariaceae and is endemic to eastern Australia.  It grows in rainforest or wet eucalyptus forest near the coast and in the Coastal Ranges, and is occasionally associated with mangroves. Occasionally it is found in the drier rainforests.  It grows naturally as far south as Mimosa Rocks National Park in far south eastern New South Wales, and north to Fraser Island in Southern Queensland. The Four Commanderies of Han (Hangul: 한사군 ; Hanja: 漢四郡 ) were the Chinese colony located in northern Korean Peninsula and part of the Liaodong Peninsula.  The commanderies were set up to control the populace in the former Gojoseon area as far south as the Han River, with a core area at Lelang near present-day P'yongyang by Emperor Wu of the Han dynasty in early 2nd century BC after his conquest of Wiman Joseon.  Though disputed by North Korean scholars, Western sources generally describe the Lelang Commandery as existing within the Korean peninsula, and extend the rule of the four commanderies as far south as the Han River (Korea).  However, South Korean scholars assumed its administrative areas to Pyongan and Hwanghae region. Domari is an Indo-Aryan language, spoken by older Dom people scattered across the Middle East and North Africa.  The language is reported to be spoken as far north as Azerbaijan and as far south as central Sudan, in Turkey, Iran, Iraq, Palestine, Israel, Jordan, Egypt, Sudan, Libya, Tunisia, Algeria, Morocco, Syria and Lebanon.  Based on the systematicity of sound changes, we know with a fair degree of certainty that the names "Domari" and "Romani" derive from the Indo-European word "ḍom".  The language itself actually derives from an Indo-European language.  It shares many similarities to Punjabi and Rajasthani, two languages that originated in India.  The Arabs referred to them as "nawar" as they were a nomadic people that originally immigrated to the Middle East from India. Pseudotsuga menziesii" var.  "menziesii, also known as coast Douglas-fir, Oregon pine, or Douglas spruce, is an evergreen conifer native to western North America from west-central British Columbia, Canada southward to central California, United States.  In Oregon and Washington its range is continuous from the Cascades crest west to the Pacific Coast Ranges and Pacific Ocean.  In California, it is found in the Klamath and California Coast Ranges as far south as the Santa Lucia Mountains with a small stand as far south as the Purisima Hills, Santa Barbara County.  In the Sierra Nevada it ranges as far south as the Yosemite region.  It occurs from near sea level along the coast to 1800 m in the California Mountains.  Further inland, coast Douglas-fir is replaced by Rocky Mountain or interior Douglas-fir ("P. menziesii" var.  "glauca").  Interior Douglas-fir intergrades with coast Douglas-fir in the Cascades of northern Washington and southern British Columbia. Cumbric was a variety of the Common Brittonic language spoken during the Early Middle Ages in the "Hen Ogledd" or "Old North" in what is now Northern England and southern Lowland Scotland.  It was closely related to Old Welsh and the other Brittonic languages.  Place name evidence suggests Cumbric may also have been spoken as far south as Pendle and the Yorkshire Dales.  The prevailing view is that it became extinct in the 12th century, after the incorporation of the semi-independent Kingdom of Strathclyde into the Kingdom of Scotland. WGR, or WGR Sports Radio 550, is an all sports radio station in Buffalo, New York that broadcasts on 550 AM.  It is the flagship station of the Buffalo Bills and Buffalo Sabres, carrying a mostly locally originated sports talk and play-by-play lineup.  Its studios are located in Amherst, New York, and transmitter in suburban Hamburg, New York.  Although it has a power of 5,000 watts, during the day its signal can be heard as far north as Barrie, Peterborough and Kingston, Ontario, as far west as Windsor, Ontario, as far east as Syracuse, and as far south as Sandusky, OH and Youngstown, Ohio.  At night its signal can be heard as far north as Sudbury, Barrie and Peterborough, Ontario, as far west as Guelph, Kitchener and Waterloo, Ontario, as far east as Batavia, and as far south as Jamestown and Olean.  In nearby Erie, Pennsylvania the station has a city-grade signal, primarily in Erie's eastern suburbs.  Under ownership of Entercom, its studios are located on Corporate Parkway in Amherst, New York. Mitla Zapotec, or "Didxsaj," is an Oto-Manguean language of Oaxaca, Mexico.
Answer: Nicaragua and Costa Rica