In English, when speaking to children, adults sometimes use words like "doggie" for dog, "boo-boo" to refer to an injury, or "upsy-daisy" if a child falls. Do Germans have something similar when they speak to babies and young children?
Yes, German does have these kind of words. I'll borrow some of your examples:
- Doggie would be Wauwau, also a pretty childish term.
- Boo-boo could be translated as Wehweh, Wehchen or plainly as Aua (which is in this context rather used for children/babies).
- Upsy-daisy is similar to Hoppla, but that's a term that can be used for other age groups, too.
Other examples would be pipi and kaka, translated as pee-pee and poo-poo. (credits to @Fabby)
You will notice the similarities here: doubling the syllables. This is often an indicator for more childish words, or words used with babies. This can be derived from the simplicity of these words, regarding the low state of language development of the babies. (e.g. Wehweh, Mama, Papa,...)
The words are often results of onomatopoeia, too: e.g. Wauwau, Lala (music), BrummBrumm (car), ...
Do Germans have something similar when they speak to babies and young children?
Yes, we do. This is called Baby Talk. On the German Wikipedia it is defined as follows:
Unter Baby Talk oder Motherese (Aussprache: [ˈmʌðəɹiːs]; engl.), fachsprachlich Infant-directed speech, ungenau auch Ammensprache, Kinder- oder Babysprache oder umgangssprachlich „Mutterisch“ oder „Elterisch“ genannt, versteht man eine Varietät einer Sprache, die bevorzugt gegenüber Säuglingen und Kleinkindern gebraucht wird.
An example is Husch-Husch for Eisenbahn (a train).
Also commonly used:
- in die Heia gehen = ins Bett gehen (go to bed)
- killekille machen = kitzeln (to tickle)
- kikeriki = den Ruf des Hahns nachahmen (mimic the cock's call)
- Töfftöff = Auto (car)
- winke, winke machen = mit der Hand winken (wave one's hand)
All examples are labelled as Kindersprache by Duden, unfortunately you can't specify that in the search.
some words that come to my mind (and no idea how common they are :D )
papa- daddy / father
mama- mom / mother
kacka- things better to be brought to the toilet
Bubu(machen) - sleep ( to sleep )
Balla- a ball
kiekuck!- after hiding for some seconds, to greet the baby when it sees you
Pulla- baby bottle