This is a simple list of 184 languages with the corresponding language codes according to ISO 639-1. ISO 639 is a standardized nomenclature used to classify languages (Wikipedia).
This list can be used as global tags.
To do this, you must first create a new property in your chosen database. Select "Relation" as the property type and then select the database "List of languages". Finally, you can select languages for each entry.
Can I modify this database?
Yes, after you have duplicated this database, you can edit it freely.
Notion list of languages