'Stain' or '[woodland] scrub' may be English equivalents of 'La Macchia'. Whatever the translation, the word 'macchia' is a feminine noun whose definite article is 'la' ['the'] and whose indefinite article is 'una' ['a, one']. The phrase is pronounced 'lah MAHK-kyah'.
Salta la macchia! in Italian means "Jump over the spot!" in English.
La bocca in Italian is "the mouth" in English.
La bella in Italian means "the beautiful" in English.
La vita in Italian means "the life" in English.
La cucina in Italian means "the kitchen" in English.
La padrona in Italian means "the mistress" in English.
La volpe in Italian means "the fox" in English.
La libertà in Italian means "liberty" in English.
La chiesa in Italian means "the church" in English.
La gamba in Italian means "the leg" in English.
La means "the" so la rosa is "the rose" when translated from Catalan, Italian or Spanish to English.
"Prairie" in English (la) prateria in Italian.