Each of these riddles clues:
the name of a famous deceased composer - specifically, BEETHOVEN, BIZET and RACHMANINOFF.
My prefix is a veggie,
My infix is... though, it's on the interblags [citation: xkcd]
My suffix is to eat, in Spanish, in English, in Spanish,
And altogether I am not GERMANE, but am GERMAN.
Prefix: A BEET is a vegetable;
Infix: THO is Internet-slang for 'though';
Suffix: This line requires some back-and-forth between Spanish and English: EAT (English) is COME in Spanish, then COME in English is VEN in Spanish. (Thanks @xyldke in comments.)
Together (with overlap), BEET + THO + VEN = Ludwig van BEETHOVEN (1770-1827), a German composer.
My prefix is two,
My infix, is, misspelled.
My suffix is my country's, and?
My whole speaks of spicy peppers and bullfighters.
Prefix: BI means 'two';
Infix: IZ is 'IS' misspelled;
Suffix: ET is 'and' in French.
Together (with overlap), BI + IZ + ET = Georges BIZET (1838-1875), the French composer of the opera Carmen which is set in Spain, with its connotations of spicy peppers and bullfighting.
My prefix is another, but B->R,
My infix is what I am, basically,
My suffix is in off.
Altogether, I am from... what was it... "Stars of Russkie"?
Prefix: RACH is BACH (the name of yet another composer) with the 'B' becoming an 'R';
Infix: This composer was a MAN;
Suffix: Quite literally, INOFF.
Together, RACH + MAN + INOFF = Sergei RACHMANINOFF (1873-1943), a Russian composer born (according to some sources) in Starorussky Uyezd.