From The Fine Article: > The extent of irregularity came as a shock. I had always believed that the Finno-Ugric family of languages, to which Estonian belongs,

From The Fine Article: > The extent of irregularity came as a shock. I had always believed that the Finno-Ugric family of languages, to which Estonian belongs, was “agglutinative” – that is, with words being formed by adding strings of endings in a regular way. Estonian has far more irregularity than this would suggest: consonant gradation can make forms difficult to recognise, and every putative rule seems to have exceptions.