Istro-Romanian is an Eastern Romance language spoken today in a few villages and hamlets in the peninsula of Istria, in Croatia on the northern Adriatic, as well as in places where the Istro-Romanian people settled after the two world wars, most notably in Italy, the United States, Canada, Argentina, Bolivia, Chile, Peru, Venezuela, Australia, Sweden, and Germany.
Sicilian ("sicilianu" ; in Italian: "Siciliano"; also known as Siculo ("siculu" ) or Calabro-Sicilian) is a Romance language spoken on the island of Sicily and its satellite islands.
 It is also spoken in southern and central Calabria (where it is called Southern Calabro), in the southern parts of Apulia, Salento (where it is known as Salentino), and Campania, on the Italian peninsula, where it is called Cilentano (Gordon, 2005).
 The "Ethnologue" (see below for more detail) describes Sicilian as being "distinct enough from Standard Italian to be considered a separate language" (Gordon) and is recognized as a "minority language" by UNESCO.
 Some assert that Sicilian represents the oldest Romance language derived from Vulgar Latin, but this is not a widely held view amongst linguists and is sometimes strongly criticized.
 Sicilian has the oldest literary tradition of the Italic languages.
Dalmatian or Dalmatic was a Romance language spoken in the Dalmatia region of Croatia, and as far south as Kotor in Montenegro.
 The name refers to a tribe of the Illyrian linguistic group, Dalmatae.
 The Ragusan dialect of Dalmatian was the official language of the Republic of Ragusa, though in later times Venetian (representing the Romance language population), then Eastern Herzegovinian dialect of Serbo-Croatian (for the Slavophone population) came to supersede it.
The history of the Romanian language began in the Roman provinces of Southeast Europe north of the so-called "Jireček Line", but the exact place where its formation started is still debated.
 Eastern Romance is now represented by four variantsDaco-Romanian, Aromanian, Megleno-Romanian, and Istro-Romanianwhich originated from a common Proto-Romanian language.
 These variants also had a common substratum.
 The latter's morphological and syntactic features seem to have been similar to those shared by the languagesincluding Albanian, Bulgarian, and Macedonianwhich form the Balkan sprachbund.
 The adoption of a number of Proto-Slavic and Old Church Slavonic loanwords by all Eastern Romance variants shows that their disintegration did not commence before the 10th century.
The Balkan mountain range (Bulgarian and , Latin Serbian Stara planina, "Old Mountain"; ] ; ] ) is a mountain range in the eastern part of the Balkan Peninsula.
 The Balkan range runs 560 km from the Vrashka Chuka Peak on the border between Bulgaria and Serbia eastward through central Bulgaria to Cape Emine on the Black Sea.
 The highest peaks of the Balkan Mountains are in central Bulgaria.
 The highest peak is Botev at 2,376 m, which makes the mountain range the third highest in the country, after Rila and Pirin.
 The mountains are the source of the name of the Balkan Peninsula.
Aromanian ("limba armãneascã ", "armãneshce ", "armãneashti ", "rrãmãneshti "), also known as "Macedo-Romanian" or "Vlach", is an Eastern Romance language spoken in Southeastern Europe.
 Its speakers are called Aromanians or Vlachs (a broader term and an exonym in widespread use to define Romance communities in the Balkans).
Romanian grammar is the body of rules that describe the structure of expressions in the Romanian language.
 Standard Romanian (i.e. the "Daco-Romanian" language within Eastern Romance) shares largely the same grammar and most of the vocabulary and phonological processes with the other three surviving varieties of Eastern Romance, viz.
 Aromanian, Megleno-Romanian, and Istro-Romanian.
The La Spezia–Rimini Line (also known as the Massa–Senigallia Line), in the linguistics of the Romance languages, is a line that demarcates a number of important isoglosses that distinguish Romance languages south and east of the line from Romance languages north and west of it.
 The line runs through northern Italy, very roughly from the cities of La Spezia to Rimini.
 Romance languages on the eastern half of it include Italian and the Eastern Romance languages (Romanian, Aromanian, Megleno-Romanian, Istro-Romanian), whereas Spanish, French, Catalan, Portuguese as well as Gallo‒Italic languages are representatives of the Western group.
 (Sardinian does not fit into either Western or Eastern Romance.)
Southeast Europe or Southeastern Europe is a geographical region of Europe, consisting primarily of the coterminous Balkan peninsula.
 There are many overlapping and conflicting definitions as to where exactly Southeastern Europe begins or ends or how it relates to other regions of the continent.
 Sovereign states that are most frequently included in the region are, in alphabetical order: Albania, Bosnia and Herzegovina, Bulgaria, Croatia, Greece, Kosovo, Macedonia, Montenegro, Romania, Serbia, and Slovenia.
Macedonia is a geographical and historical region of the Balkan peninsula in southeastern Europe.
 Its boundaries have changed considerably over time, however it came to be defined as the modern geographical region by the mid 19th century.
 Nowadays the region is considered to include parts of six Balkan countries: Greece, the Republic of Macedonia, Bulgaria, Albania, Serbia and Kosovo.
 It covers approximately 67000 km2 and has a population of 4.76 million.

Question: Aromanian, is an Eastern Romance language spoken in which geographical region of Europe, consisting primarily of the coterminous Balkan peninsula?
Answer: Southeast Europe