Doronko What-o??

[JamuThatsWho]

*laughs in Bri'ish*

[Machination]

Apparently, "wanko" is word for "doggy" in japanese

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わんわん wan wan is the onomatopoeia for a dog barking in Japanese.

こ ko has many meanings, in this case it means 子 ko child or the smaller/younger version of something, like the diminutive "-y" or "-ie" in English[en.wiktionary.org].

わんこ wan ko (not wank-o) means doggy or puppy, usually said by children or in a cute/informal way.

子犬 ko inu (literally child-dog) is the proper word for puppy.

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Dog sounds in different languages:
https://www.omniglot.com/language/animalsounds/dogs.htm