WP Timeline Designer plugin is language compatible, thus can be translated into multiple languages. You can use POEdit plugin for translation.
Step 1. Install Poedit tool and open itStep 2. Open .POT file from /wp-content/plugins/wp-timeline–designer-pro/languages/ that you want to translate

Step 3. Now, click on “Save”
Step 4. A popup will appear, enter your Language code ( Ex :- “ca_CA” for English (Canada)) in language option

Step 5. Then select source path tab and you have to modify this path to full path of your plugin that you want to translate.

Step 6. Then press ok button.
Step 7. Then give file name like this wp-timeline-designer-pro-ca_CA.po for English (Canada) language.
Step 8. Then save file inside language folder in plugin that you want to translate and all strings are appear in your poedit editor

Step 9. Select your string that you want to translate and in bottom side there are two options one is Source Text and another one is Translation

Step 10. Source Text keep as it is and in Translation section enter your translated string of selected string that you want to translate and then save it
Step 11. Repeat step 10 until your all strings to be translate.
Step 12. Now you will get two separate files – a .po file and a .mo file. Note : When you save the files, you must name them according to your language code. Find a list of language codes at WordPress in your Language. For example, the language code for English (Canada) is ca_CA, so you would save the translated files as ca_CA.po and ca_CA.mo.

Step 13. Then go to wp-config.php file then enter the below code.
define('WPLANG', 'Your language code');
for Ex.(ca_CA for English (Canada)) then save it.
Step 14. Select language from admin side, Go to Dashboard » Settings » General in that check Site Language options.

Step 15. Check language prefix in front end, view HTML.
