+ Finnish: both pidempi and pitempi are possible and common, so I added the latter. I also added another way of saying "longer than".
+ South Ostrobothnian: I decided to show the assimilation of final -n in
kun ('than') in writing (>
kuv). There aren't standardised spellings for dialects in Finnish, but the assimilation is often showed in books, comics and other texts written in this dialect. (Moreover, if I had written it as
kun, it would've suggested its pronounced [kun ʋolokɑ], and if I had written
ku, that'd be pronounced [ku ʋolokɑ], whereas the pronunciation I had mind was [kuʋ:olokɑ]. I don't know if anyone really cares but I do!
) About the name Volga and its spelling: AFAIK, you can hear it pronounced either [ʋolokɑ], [ʋolkɑ], [ʋologɑ], or [ʋolgɑ], but I chose the first one here because it's the most stereotypically "in dialect" variant of them. (Tbh Finnish and dialects especially have very few minimal pairs of K vs G, so the actual phone used here can be almost anything between a [k] and [g].)
English The Volga is long. The Nile is longer. The Nile is longer than the Volga.
German Die Wolga ist lang. Der Nil ist länger. Der Nil ist länger als die Wolga.
Norwegian (bokmål) Volga er lang. Nilen er lengre. Nilen er lengre enn Volga.
Norwegian (nynorsk) Volga er lang. Nilen er lengre. Nilen er lengre enn Volga.
Spanish El Volga es largo. El Nilo es más largo. El Nilo es más largo que el Volga.
Portuguese O Volga é longo. O Nilo é mais longo. O Nilo é mais longo que o Volga.
Russian Волга - длинная. Нил - длиннее. Нил длиннее, чем Волга / Нил длиннее Волги.
Latvian Volga ir gara. Nīla ir garāka. Nīla ir garāka nekā Volga / Nīla ir garāka par Volgu.
Irish Tá an Volga fada. Tá an Níl níos faide. Tá an Níl níos faide ná an Volga.
South Saami Volga guhkie. Nijle guhkebe. Nijle guhkebe Volgeste.
North Saami Volga lea guhkki. Niila lea guhkit. Niila lea guhkit go Volga.
Estonian Volga on pikk. Niilus on pikem. Niilus on pikem kui Volga.
Finnish Volga on pitkä. Niili on pidempi/pitempi. Niili on pidempi/pitempi kuin Volga. / Niili on Volgaa pidempi/pitempi.
South Ostrobothnian Voloka on pitkä. Niili on pitee/piree. Niili on pitee/piree kuv Voloka. / Niili on Volokaa pitee/piree.
Mari (Meadow) Юл эҥер кугу. Нил эҥер кугурак. Нил эҥер Юл эҥер деч кугурак / Нил эҥер Юл эҥер деч кугу.
Japanese ヴォルガ川は長いです。ナイル川の方が長いです。ナイル川の方がヴォルガ川より長いです。
Japanese (rōmaji) Voruga-gawa wa nagai desu. Nairu-gawa no hou ga nagai desu. Nairu-gawa no hou ga Voruga-gawa yori nagai desu.