In Italian, I use both the loan word ("Cookie") and the literal translation ("Biscotto")

First, a little background. Tatoeba itself does not have any notion of "wildcards". One particular contributor writes sentences that make use of a single human male name, a single human female name, a single surname, a single pet name, even a single day of the week, time of day, country name, address, and on and on. He chose that practice, and those names, without regard for any of the following:

- how well the names can be translated into other languages
- whether use of those "wildcards" would drive out use of other possible names, times, and so on

Since that contributor is very prolific, and writes in English (the most translated language and also the one with the most sentences), the effects have propagated through the entire corpus, probably mostly because people have translated those sentences, and to a smaller degree because people have followed his example when writing new sentences.

You have various choices, which are not mutually exclusive:
- Skip these sentences when translating.
- Write your own Chinese sentences with your own pet names. (I intentionally wrote "names" rather than "name" because using the same name every time perpetuates the original problems.)
- Add comments to at least one of those sentences discussing the name you used and how it might be translated.
- Translate your own such Chinese sentences into English.
- Write your own original English sentences.
- Write sentences that refer to pets without using their names. (For instance, in English, this could be done with pronouns.)

Or, if you are intent on translating these sentences:
- Use a name that means something close to though not identical to "cookie", but would be more easily understood as a pet name.
- Use a name that sounds close to though not identical to "cookie", but would be more easily understood as a pet name.
- Use the English name ("Cookie") untranslated and untransliterated, if that happens frequently in written Chinese outside Tatoeba.

An addition: "do", Chinese much less commonly use a generalized verb like English "to do".

Without knowing Chinese, some possibilities, in no particular order:

1. Leave the difficult sentences untranslated. Maybe you have a better idea when you meet them in the future, and there is no lack of English sentences to translate, not to speak of other languages.
2. Look at other translations of the sentence for inspiration. (But be careful to add any translation to the sentence it is a translation of.)
3. Consider a context for the original sentence, and then consider how you would or could translate the entire context, and then check if that creates a valid translation for the sentence in question.
4. To translate "He loves her." into Finnish, I have to do some maneuver like "he" -> "man/boy" or "she" -> "woman/girl", as "he" and "she" both translate to "hän", and "Hän rakastaa häntä." is a somewhat strange construction. I do consider these various variations with man, boy, girl or woman to be acceptable translations.
5. English has constructions like "There is a car in the garage.", where the "there is" part has no equivalent in Finnish, so this would simply become "Autotallissa on auto.". The structure of the sentence is different, but the meaning is the same. A valid translation.

I don’t think every sentence is meant to be translated in every language; just don’t translate a sentence if it feels too weird. You can add your own sentences that reflect a broader and more typical use of Chinese, and let other members translate your sentences.

I don't know if it's OK, but I do the same thing ;-)

I don't have a problem with that.

I don't think anyone has ever objected to puns here. There's a pun tag with some 250 sentences so marked. It would be interesting to learn some Chinese puns, which must be numerous given its logographic writing.