co-official

not-comparable

Jointly official, having full official status alongside another official one.

Japanese Meaning

共同で公式な / 他の公認な資格と並んで、完全な公認の地位を有している

The town council declared the regional flag co-official alongside the historical banner to honor both traditions.

町議会は両方の伝統を称えるため、地域の旗を歴史的な旗と共同で正式な地位を持つものとして宣言した。

Sense（1）

Jointly official, having full official status alongside another official one.

Catalan is a co-official language of the European Union.