The Joomla Post Installation Messages component provides messages that may require your further action after the installation or update of the Joomla Content Management System, or any other extension which uses it - it is optional as to whether or not another extension uses the Post Installation Messages component.
This Post Installation Messages component is accessible through the Administrator area 'Components' tab.
In Joomla version 3.10.x Multilingual Associations is managed via the Administrator area 'Components' tab and then selecting the 'Multilingual Associations' tab.
The above Components menu image shows only the Joomla default components.
Menu items with a right-pointing triangle 
have a sub-menu available
In Joomla version 3.10.x Multilingual Associations is managed via the Administrator area 'Components' tab and then selecting the 'Multilingual Associations' tab.
The above Components menu image shows only the Joomla default components.
Menu items with a right-pointing triangle have a sub-menu available
Post Installation Messages component - Help
