Enable the welcome message language strings to be customised

Use the language customisation tool and customise the string "welcomeback" from the moodle.php (core) component. Alternatively, you can directly edit the file moodledata/lang/en_local/moodle.php and then purge lang caches, or have CFG->langstringcache set to 0. Log in to the site. TEST: Check that you see the message "Welcome back, ..." matching your customised string. As admin create a new user in the site. Using the same technique than in step #1, now edit the "welcometosite" string. Log in the site as the new user just created. TEST: Check that you see the message "Welcome, ..." matching your customised string. Examples of supported placeholder values: $string['welcomeback'] = 'Welcome back, {$a->firstname}! 👋'; $string['welcomeback'] = 'Welcome back, {$a->lastname}! 👋'; $string['welcomeback'] = 'Welcome back, {$a->alternatename}! 👋'; $string['welcomeback'] = 'Welcome back, {$a->middlename}! 👋'; $string['welcomeback'] = 'Welcome back, {$a->lastnamephonetic}! 👋'; $string['welcomeback'] = 'Welcome back, {$a->firstnamephonetic}! 👋'; $string['welcomeback'] = 'Welcome back, {$a->fullname}! 👋'; $string['welcomeback'] = 'Welcome back, {$a->alternativefullname}! 👋';