I think you can simply translate it into "字串".
You can take the link for reference.

c/cpp 社群似乎翻譯為「字串常數」
https://www.ptt.cc/bbs/C_and_CPP/M.1463157729.A.28B.html

I think the word "literal" is still important enough to include it in the translation, there's a difference between using and without using the vocabulary "literal", e.g. "some string" is a string literal, "some" + "string" is not a string literal but is a string. For "formatted string literals" here, the syntax can only be used when it's a string literal.

I think "字串常數" is a plausible translation as its property of being a constant is documented inside Python's language reference, I've also seen people translating it to "字串文本", "字串常值", "字串字面值" etc. All the translations sound unnatural to me anyways, but I personally prefer "字串文本" just because "字串常數" can be confusing to those who come from programming languages that have constants.

Anyhow, for each translated document that has the word "string literal" or "bytes literal" or something similar in it, we should always quote the original English word for the first appearance in that document, see tutorial/introduction.po for an example.

Thanks for the explanation.

For each translated document that has the word "string literal" or "bytes literal" or something similar in it, we should always quote the original English word for the first appearance in that document.

In sum, let's take "字串文本" as "string literal".

Maybe just leave this open for discussion?