What does the idiom new student spoke in a foreign tongue?

The idiom "new student spoke in a foreign tongue" is not a common idiom. It's likely a made-up phrase that aims to express the idea that a new student's words or actions were unintelligible or confusing to others.

Here's how the phrase might be interpreted:

* "Foreign tongue" metaphorically represents something unfamiliar or incomprehensible.

* "New student" highlights the lack of understanding or connection with the existing group.

However, it's important to note that this phrase isn't commonly used, so its meaning might be interpreted differently depending on the context.

If you're looking for a more common idiom to convey the same meaning, consider using phrases like:

* "Spoke a different language"

* "Was on a different wavelength"

* "Didn't get it"

* "Couldn't understand a word"

These idioms clearly express the feeling of confusion and misunderstanding.