Complex sentence: His reconstruction of such migrations has not been well received but his studies suggest a strong link between certain Asian language families that include Hungarian (his native tongue) and languages of the Ob River and the Penutian languages of California.
Split into simpler sentences: His reconstruction of such migrations has not been well received. In his studies, he suggests a link between certain Asian language families that include Hungarian (his native tongue) and languages of the Ob River and the Penutian languages of California.