Change language name

You can change the language name from the language switcher using a bit of coding:

1. Create an empty plugin like this:

2. Add the following code to the end of it:

 * Change language name. 
 * This is what is shown in the language switcher when full language name is selected.

add_filter( 'trp_beautify_language_name', 'trpc_change_language_name', 10, 3 );
function trpc_change_language_name ($name, $code, $english_or_native ){
	if ( $code == 'fr_CA' ){                // replace with the code of the language to change
		return 'Français (Canada)';     // replace with your desired language name
	return $name;

3. Modify the code by editing the language code and the language name. The rest of the languages will not change.

4. Install this plugin via FTP (copy it inside wp-content/plugins) or create a zip archive with it and install it via the WordPress plugin upload functionality