The language this text is in, as an ISO code. Pango can use this as a hint when rendering the text. If you don't understand this parameter, you probably don't need it
Testu honetako hizkuntza ISOren kode gisa dago. Pango-k laguntza gisa erabil dezake testua bihurtzean. Parametro hori ulertzen ez baduzu, beharbada ez duzu beharko