Undertranslate

Secondly, there is a tendency to undertranslate, viz. to normalise by generalising, to understate, in all translation but particularly in literary translation.

Source: wiktionary

Only Borell and Adam undertranslate this opener as "What brings you here, Adler?"

Source: wiktionary

I was told specifically that they were going to undertranslate differences between, say, present and aorist infinitives, because there was no agreement on how to handle the differences.

Source: wiktionary