5.8 Intent Examples
https://www.w3.org/TR/mathml4/#mixing_intent_examples

Using the underscore function may also add clarity when the fragments of a compound name are explicitly localized. A Cyrillic (Bulgarian) example:

There is only one example in the specification that shows a non-English example for intent. More non-English examples in other languages should be added. These examples should be paired with an explanation of how the intent and xml:lang attributes interact.