"I speak Italian" is an English equivalent of "Parlo italiano."
The verb "parlo" means "(I) am speaking, do speak, speak." The masculine noun "italiano" means "Italian." Its singular definite article is "l"* ("the").
The pronunciation is "PAHR-loh EE-tah-LYAH-noh."
*The masculine singular definite article actually is "il." But the vowel "i" drops before a noun that begins with a vowel. The temporary nature of the drop is indicated by an apostrophe: "l'."
I don't speak Italian is "Non parlo italiano".
"Non parlo Italiano."
"Io parlo solo italiano." I think that this is what you're looking for.
"Translate English into Italian" in English is Traduca l'inglese in italiano in Italian.
"I speak Italian brilliantly!" in English is Parlo l'italiano brillantemente! in Italian.
"Not italian" in English is non italiano in Italian.
Parliamo italiano allora! in Italian means "Therefore, let's speak Italian!" in English.
"I can't speak English!" in English is Non parlo l'inglese! ("I don't speak English!") in Italian.
che è italiano che è italiano
È bene essere un italiano(It is good to be an Italian)"It is good to be an Italian!" in English is È bello essere Italiano! in Italian.
Calcio italiano dal 1910 in Italian is "Italian football since 1910" in English.
"Provincial Italian" in English is italiano provincialein Italian.