Verse 1
Italian
Loro non sanno di che parlo, voi siete sporchi, fra', di fango.
English
They don't know what I'm talking about, you guys are dirty, bro, with mud.
Grammar focus
'Loro non sanno' is the third person plural of 'sapere' (to know facts) — distinct from 'conoscere' (to know people/places). 'Di che parlo' literally = 'of what I'm talking', a typical Italian construction where the preposition 'di' precedes the question word. 'Fra'' is apocopated 'fratello' (brother) — modern Roman youth slang for 'bro'. You'll hear it constantly in Italian rap and hip-hop. The original Eurovision broadcast bleeped a different word in this verse, but the version above is the clean line.
Vocabulary highlights
vs 'conoscere' (to know people/places)
Apocopated 'fratello' — Roman/youth slang