Regular sound correspondences between Hungarian and other Uralic languages The relationship is most obvious when comparing all Uralic languages together, for then individual idiosyncrasies are averaged out, but here we will just compare Hungarian with Finnish and Estonian (two Finnic languages). One important innovation of Hungarian is the lenition of the stop consonants *p *k in initial position. The third stop inherited from Proto-Uralic, *t, did not undergo such a change. In the middle of words (note that due to the loss of the word final vocals in the Old Hungarian period these are now at the end of the words), Hungarian has also lenited original stops, but in
Uralic languages published the most complete work on Finno-Ugric to that date. Up to the beginning of the 19th century, knowledge on the Uralic languages spoken in Russia had remained restricted to scanty observations by travelers. Already Finnish historian Henrik Gabriel Porthan had stressed that further progress would require dedicated field missions. One of the first of these was undertaken by Anders Johan Sjögren, who brought the Vepsians to general knowledge and elucidated in detail the relatedness of Finnish and Komi. Still more extensive were the field research expeditions made in the 1840s by Matthias Castrén (1813–1852) and Antal Reguly (1819–1858), who