A Linguist.
No, actually "grammer" is a common misspelling of the correct word, grammar. A synonym phrase for grammar might be "structured language".
A language specialist is often called a linguist. Linguists study the structure, history, and usage of languages, and may specialize in various subfields such as phonetics, syntax, or sociolinguistics.
Not that I'm aware of, bilingual says it best.
A linguist is a specialist who studies records of languages and words. Linguists analyze language structures, historical texts, and word origins to understand the development and evolution of languages over time. Their work helps uncover patterns, connections, and changes in language use.
An synonym is a word with the almost same meaning as another word.
Insect specialist?
Expert, judge, specialist
coroner synonym : pathologist antonym : obstetrician, neonatal specialist, pediatrician
There is no single-word synonym for "their" in the English language.
Such a person is a specialist in language history, or a linguistic historian.
Yes it is, tongue and mother tongue as a synonym.
the synonym for the word above is learing
principal
the same
Language or nomenclature.
Argot is a French, Spanish, and Catalan word meaning "slang." So I suppose the synonym would be "slang." It is also a secret language, so secret language could be another synonym for it.
There isn't such word in the english language.