According to https://glossary.cncf.io/es/tags/ ,

There exist some terms whose tags are set to:
- 'Fundamental' (which seems that not translated into Spanish and remain in English)
- 'Fundamento'
- 'Fundamentos'
This is not desirable, since for example the term 'Abstracción' is displayed when filtered with the tag 'Fundamental', but not with the tag 'Fundamento'.