You can translate plugin in Bulgarian language.
Translate plugin in to any language very essay.
Using https://translate.google.co.in/ you can convert text English to your language.
1)Create New file in i18n folder
name as Bulgarian.json
2)Copy all English.json file in to Bulgarian.json
3)You need to replace all English text content with Bulgarian
Go to https://translate.google.co.in/ translator or you can do also manually.
Ex.
“SIGN_IN”: “Sign in”
above text in to English and you need to convert in to Bulgarian
then replace ‘Sign in’ text as ‘Влизане’ (Bulgarian)
“SIGN_IN”: “Влизане”
Like wise replace all text.
4) Add newly added language in to Admin back end setting
Go to wp-user/includes/admin/views/templates/settingView.html
open file in text editor and add new line
<option class=”ng-scope ng-binding” value=”Bulgarian”>Bulgarian</option>
below following line (line no 103)
<option class=”ng-scope ng-binding” value=”German”>German</option>
5) Go to login in to WordPress
Go to Dashboard=> WP User => General => Appearance and Look
and set language as ‘Bulgarian’
Let me know in case any difficulty.
Also send us Bulgarian.json file so that we can add this file in new version so that you can easily get new updates.
If you have face any difficulty then send us only Bulgarian.json file we can add in to plugin and release new version.