How to change a Language in Event plugin

I want to translate the plugin to Vietnamese language
Steps i have taken:
1. I have downloaded the eab.po
2. I have uploaded it to the /public_html/wp-content/plugins/events-and-bookings/languages
3. I have changed in my WP-config.php the naguage ot show: vi
However the only thing that happened is that my Wordpress Admin has switched to Vietnamese.
Would very much appreciate if anyone can share some light on what am i doing wrong here.