It is a Gemanic language so it is related to German, but also Dutch and it also has lesser influences from other languages, such as French.
No, they are unrelated languages. The modern Macedonian language is a slavic language, related to Russian and Polish. The ancient Macedonian language was most likely a dialect of Greek, or at least related to Greek.
The language most closely related to English is Frisian, a language spoken in the Netherlands and Germany.
C++ is related to C, the language from which it is derived.
Basque is the European language that is not related to any other language. It is a language isolate, meaning it has no known connections to any other language family.
They speak Estonian; a language similar to Finnish or Hungarian
Both have descended from the Indo-European language family.
The native language is spelled Nahuatl (language related to Aztec).
There is no language referred to as "the chicken language", other than the spoof article listed below in related links.
English is most closely related to the Germanic language family, specifically the West Germanic branch.
The language most closely related to Vietnamese is Muong, which is a language spoken by the Muong ethnic group in Vietnam. Both Vietnamese and Muong belong to the Vietic branch of the Austroasiatic language family.
Yes they are related but not mutually intelligible.
Persian