We will celebrate the day by creating & developing articles on local Wikis, proofreading the content on Wikisource, items that need to be created on Wikidata [Labels & Descriptions], some language-related content must be uploaded on Wikimedia Commons and so on. Therefore, the same dates 19 & 20 February are blocked for a two-days long edit-a-thon to increase content about languages or related to languages. Anyone can participate in this event and the link you can find below.
https://meta.wikimedia.org/wiki/International_Mother_Language_Day_2022_edit-a-thon