The closely related corresponding phenomenon of pleophony (also known as polnoglasie or full vocalization) occurred in parallel in the East Slavic languages.
In South Slavic dialects (Slovene, Serbo-Croatian, Macedonian, Bulgarian) as well in Czech and Slovak, the metathesized vowel was lengthened as well.
Compare the following reflexes: If the syllable was not acuted, the metathesis in West and East Slavic occurred without the lengthening so EPSl.
For example, in North-West Lechitic (northern Kashubian, Slovincian, Pomeranian and Polabian) and East Slavic, *CalC and *CelC merged into *CalC prior to cluster resolution: If the liquid metathesis is complete only if it occurred with the corresponding vowel lengthening, the metathesis occurred completely in South Slavic and partially in Slovak and in non-word-initial position in the whole Czecho-Slovak area.
For word-initial non-acuted syllables, there was no lengthening except in South Slavic and, partially, Slovak.
As mentioned, the complete metathesis occurred in South Slavic, in Czech and Slovak and in Polish and Sorbian, without lengthening.
There are, however, some attested unmetathised words in OCS such as ал(ъ)дии, a doublet of the metathised ладии.
Earlier sources show no effect of liquid metathesis, such as when the late-8th-century Greek chronicler Theophanes the Confessor writes Slavic names as Ἀρδάγαστος (Ardágastos) and Δαργαμηρός (Dargamērós).