No it is slang. Grossvater is high German.
No, "opa" is not High German. It is a common term for grandfather in many Germanic languages, including German. However, High German refers specifically to the standard variety of the German language used in formal and written contexts.
Grandma in German is "Oma" and grandpa is "Opa".
"Opa" is a term for grandfather in German and some other European languages like Dutch and Danish.
"Grandpa" in Flemish is "opa."
High German and Low German are two different branches of the German language. High German is spoken in the central and southern regions of Germany, while Low German is spoken in the northern regions and the Netherlands. High German is the standard form of the language, while Low German has many dialects and variations.
The two major forms of the German language are High German (Hochdeutsch), which is the standard form of the language, and Low German (Plattdeutsch), which is spoken in Northern Germany and the Netherlands.
In German, grandpa is Großvater or Opa.
Opa also means grandfather in Dutch and German. Oma means grandmother in Dutch and German.
Großvater Opa
The High German for "Great-grandmother" is "Urgroßmutter".The colloquial usage of "Great-grandma" is "Uroma".
Grossvater, Opa
Opa Opapa Großvater
The Austrian German translation for grandfather is "GroΓvater."
The common affectionate term is "Opa" for "Grandpa" and "Grandad.""Grossvater" is the formal word for "Grandfather."
Grandma in German is "Oma" and grandpa is "Opa".
Grandad is Grossvater or Opa (granpa).
Großvater = Grandfather Opa = Grandpa
u mean language..German