Kagi had a good little example of language biases in LLMs.

When asked what 3.10 - 3.9 is in english, it fails, but it succeeds in Portuguese, if you format the numbers as you would in Portuguese, with commas instead of periods. image

This is because… 3.10 and 3.9 often appear in the context of python version numbers, and the model gets confused, assuming there is a 0.2 difference going from version 3.9 to 3.10 instead of properly doing math.