Check backing. If woven and you can see pattern then its a wilton, do burn test, if the end of the fibres melt into a hard ball then yes...... Belgian wilton.
Like calmore says, any woven backed carpets has the ability to shrink but the synthetic ones are the ones to really watch for, they can be done under circumstances if you're experienced enough. I did two last week with a porty, but only mildly soiled. Low pressure, high temp, central heating on full with ventilation and a blower, plenty of pre vac and aggitation. Dry and safe when I left