Base field storage for taxonomy terms has now multilingual support

Taxonomy term base field storage has been converted to support the standard multilingual variance capability for base fields that was introduced earlier.

• The {taxonomy_term} base table only holds
  | tid* | uuid | vid | langcode |
  Primary key: tid
• The new {taxonomy_term_field_data} table has been introduced to store multilingual values for base fields.
  | tid* | vid | langcode* | default_langcode | name | description__value | description__format | weight | changed |
  • Primary key: tid + langcode

For further details read Added multilingual support to the standard entity schema.

The main difference with the standard described above is that the bundle column ({vid}) has been replicated in the {taxonomy_term_field_data} table to keep the related index and avoid a performance degradation for certain queries.