Dot can't be drew in Arabic text or Thai text

Dot "." can't be drew in Arabic text or Thai text while in Arabic or Thai font, there's no dot glyph, but there's other font like Roboto-Regular.ttf(in the same font file) that supports latin script and dot as well. QML Text Module could't really pick another font file when the first font file cant really render all characters? The sample code could be like:

Text

{ id:text anchors.fill: rect text:"في الجزء العلوي من الحركة، ينبغي على راحتي يديك تواجه الأرض. خفض الدمبل في الحركة التي تسيطر عليها." color:"red" font.pixelSize: 40 wrapMode: Text.Wrap font.family: "Droid Arabic Naskh" }

while Arabic Naskh font doesn't really have dot glyph (but in the same font file, there's Roboto font, Droid Sans font which supports dot"

Thai texts have the same problem...