Slavic languages are not considered agglutinative but fusional. Navajo is sometimes classified as a fusional language and sometimes as agglutinative or even polysynthetic. Latin and Greek are prototypical inflectional or fusional languages. Some languages shift over time from agglutinative to fusional. These subtypes are "agglutinative" and "fusional" (or "inflectional" or "flectional" in older terminology). Analytic, fusional, and agglutinative languages can all be found in many regions of the world. Typologically, Estonian represents a transitional form from an agglutinating language to a fusional language. The table illustrates also why Sirenik language is treated as agglutinative (rather than fusional). In fusional languages and polysynthetic languages, this is often not the case. Ho-Chunk is an agglutinating and somewhat fusional language. Udi is agglutinating with a tendency towards being fusional. The table illustrates also why Sirenik is treated as agglutinative (rather than fusional). Verb morphology can be described as either fusional or agglutinating depending on the analysis. Northeast Caucasian languages are weakly fusional. Latin is a synthetic, fusional language in the terminology of linguistic typology.