Testing, measuring and developing Welsh AI
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Artificial intelligence glossary

The terminology used on this site. The first two sections follow the glossary in the Coleg Cymraeg Cenedlaethol report (Lewis, 2026); we have adopted the same terms for consistency.

Four people exchanging colourful shapes through an abstract language machine

Keywords

WelshEnglish
Asesu dilysAuthentic assessment
Asesu ffurfiannolFormative assessment
Camymddwyn academaiddAcademic misconduct
Cydraddoldeb ieithyddolLinguistic equity
Cyfrifoldeb digidolDigital responsibility
Datblygiad sgiliau meddwl beirniadolCritical thinking skills development
Datganiad defnydd AIAI use declaration
Dylunio asesuAssessment design
Gwybodaeth anghywir (camwybodaeth)Misinformation
Llên-ladradPlagiarism
Llythrennedd AIAI literacy
RhithwelediadHallucination
TryloywderTransparency
Uniondeb academaiddAcademic integrity
Ymchwil foesegolEthical research
Ymwybyddiaeth foesegolEthical awareness

Terminology

Welsh termEnglish termDefinition
corpws (corpora)corpus (corpora)A large collection of linguistic data, texts or audio recordings.
cyfieithu peirianyddolmachine translationThe automated process of converting text from one language into another using computer technology.
data hyffordditraining dataA collection of texts, audio recordings or other data used to train a language model.
AI cynhyrchiolgenerative artificial intelligenceAn AI system capable of generating new content, such as text, images or sound, by learning patterns in data.
lleferydd-i-destunspeech-to-textConverting spoken audio into written text using speech recognition technology.
Model Iaith Mawr (MIM)Large Language Model (LLM)A computational model that analyses vast datasets to learn and imitate human language.
rhyngwyneb defnyddiwr (UI)User InterfaceThe visual element enabling a user to interact with a system, including buttons, menus and page layout.
sgwrsfotchatbotA program that simulates human conversation using conversational AI technology.
testun-i-leferyddtext-to-speechA system that reads text aloud by generating synthetic speech.

AIsteddfod’s specialist terms

For the purposes of this website, we also use the following terms:

TermEnglishDefinition
meincnodbenchmarkA standardised, repeatable test used to measure a model’s ability — see our evaluation pages.
mireinio modelfine-tuningFurther training a base model on specific data, such as Welsh data — for example, Jupiter-N or Mwydryn.
harnaisharnessThe software environment surrounding a model during testing: instructions, tools, feedback cycles and the selection process. Further details are provided in our methodology.
rhoi cyfarwyddiadaupromptingWriting and giving instructions to a model — see how to give instructions in Welsh.
pwysau agoredopen weightsA model whose parameters can be downloaded and run locally, whether or not it has an open licence.
cerdyn modelmodel cardA standard document describing a model’s data, training, licence and limitations.

Source for the first two sections: ‘Artificial Intelligence (AI), Welsh and Higher Education’ (Kara Lewis, UWTSD / Coleg Cymraeg Cenedlaethol, June 2026) — our full analysis.