How to change activation message?

Please do these steps

1. Go to your FTP, and go to folder "wp-content/plugins"

2. Create a PHP file there and name it with "bp-custom.php". But if you already have it, you don't need to create a new one. Just open it

3. Put these snippets on the file

https://gist.github.com/KaineLabs/8f8a60704c44056bcb6a15c6126f6bf4#file-yzc_translate_activation_msg-php

4. On line 7, please change 'type your new message here' with any text you want. And then save the file.