Water people

Water People (ウォーターピープル, U~ōtāpīpuru) are a mysterious race of liquid humanoid creatures.

In Magical Vacation
Water People used to exist in the Water Realm, but were driven out when Enigmas invaded their realm. This caused them to be flung across all kinds of planes, and those who ended up in the Dark Realm created Akvavit Castle.

Some Water People can also be found in parts of the Abyssal Realm, namely May Village and the Abyssal Corridor.

The language that they speak is the Erimu Language. It's written in a gibberish blend of hiragana and katakana, and sentences close with a bubbling noise. The only way to understand what they're saying is by having Blueberry in your party, as she is fluent in Erimu.