Aggravation of the feud between Walloons and Flemings may lead to secession. The Flemish provinces might then cast their political lot with the Dutch, with whom their intercourse has been marked by a degree of friendliness which has never characterized their relations with other neighbors. This extreme course might not unreasonably be adopted as a measure of self-preservation.[20] The languages spoken in Holland and Flanders are practically identical. Religious differences alone have stood in the way of political fusion in the past. Flemish princes, swayed by religious scruples, had refused to side with the Protestant communities whose political connection had been established by the Union of Utrecht in 1597. The menace of absorption by Germany may yet drive the Flemings to union with their close kinsmen of the lowlands on the north. Walloons would then naturally revert to French allegiance. The coincidence of political and linguistic boundaries in the westernmost section of central Europe would then become an accomplished fact. The language of the Duchy of Luxemburg is a Low German dialect in which a strong proportion of Walloon French words is found. French is taught in schools and is the language of the educated classes. It is also used in tribunals, and in many places as the official language of governing and administrative bodies. The use of French is largely due to intimate intellectual ties which bind Luxemburgers and Frenchmen. It is estimated that at least 30,000 natives of the Grand Duchy, or about one-eighth of its population, emigrate to France for business reasons. Many marry French women. Maternal influences prevail with the children born of these unions with the result that, upon returning to their native land, the families bring French speech along. But French as a commercial language is on the wane throughout the Grand Duchy. German has been replacing it gradually since 1870. This is one of the results of the small state’s admission into the ring of German customs. Prior to that period business was transacted mainly in the French dialect of Lorraine. The spread of German is furthermore the result of a systematically conducted propaganda carried on with well-sustained determination. German “school associations” and “Volksvereine,” established in every city of importance, help to spread German speech and thought. Lectures of the type entitled “The beauty of Schiller’s and Goethe’s speech” are delivered by orators who are in reality skilled pioneers of empire engaged in the work of reclaiming populations to Germanism. The efficiency of their methods is proved by the results they have obtained. Out of a population of about 21,000 inhabitants, hardly 4,000 natives of Luxemburg speak French exclusively, while of the six or seven papers published in the capital, two alone are issued in French.