Royaume means "kingdom". While the word itself is not rare, its use in this song is what makes it so special and poetic.
Indila sings, "J'ai toute ma peine comme royaume" (I have all my sorrow as my kingdom). This powerful metaphor paints a picture of her sadness being so vast and all-encompassing that it has become the entire world she rules over, highlighting the song's theme of profound loneliness and isolation.
This song is a desperate cry for help, right from the first line: "C'est un SOS, je suis touchée je suis à terre" (It's an SOS, I'm hit, I'm on the ground). The singer, French artist Indila, feels completely lost and alone. She explains that she had to leave a situation because she felt she wasn't herself anymore, but this escape has led her to a different kind of prison. She feels she has fallen so low that she's become invisible, sinking into anonymity.
She describes her new reality as a kingdom made of sorrow, where she is "rien... personne" (nothing... no one). Yet, even in this dark place, she finds a strange kind of hope. She sees the light between prison bars and notices how beautiful the sky is. This glimpse of beauty is both a comfort and a form of torture, a constant reminder of the freedom she can't reach. It's a powerful song about hitting rock bottom and sending out a signal, hoping someone, anyone, will hear.