Complex sentence: German is the smallest official language in Belgium, spoken natively by less than 1% of the population, though the 71,000 person population of the German-speaking Community is almost 100% German-speaking.
Split into simpler sentences: German is the least prevelant official language in Belgium, spoken natively by less than 1% of the population. Of the 71,000 person population of the German-speaking Community almost all are 100% German-speaking.