Label-Wording Augmentation in a Typed-Decision Encoder: Gains on Unfamiliar Words, Not on Abbreviations or Codes

Vladimir Beskorovainyi

Typed-decision models score options that the caller supplies at request time, so their accuracy depends on label wording that the model's developer does not control. We compare two releases of a 307M-parameter multilingual cross-encoder, Ru-Jev, trained on thirteen Russian-language tasks; the later release adds an augmentation that presents labels in several surface forms. Holding questions fixed and varying only how eighteen routing labels are worded, we evaluate ten label vocabularies, produced by three separate processes and checked for overlap with the training data, with five candidates per question and, for eight of them, also with eighteen. On held-out vocabularies made of ordinary or borrowed words (English-derived jargon, office slang, department names), the augmented release has higher point accuracy in all fourteen cells, by up to 0.24; eleven differences survive a Holm correction and eight have a label-level interval that excludes zero. Two runs trained by mistake without the transliterated label forms stay at the earlier release's level on jargon. The comparison is between two trained releases, not a controlled ablation. On abbreviations and opaque codes the…