language
culture
standard language
dialects
isogloss
mutual intelligibility
dialect chains
language families
subfamilies
sound shift
Proto-Indo-European
backward reconstruction
extinct language
deep reconstruction
language divergence
language convergence
Renfrew hypothesis
conquest theory
dispersal hypothesis
Romance languages
Germanic languages
Slavic languages
lingua franca
pidgin language
Creole language
monolingual states
countries in which only one language is spoken
multilingual states
countries in which more than one language is in use
official language
global language
place
the fourth theme of Geography as defined by the GENIP; uniqueness of a location
toponym
place name